United States Nuclear Regulatory Commission - Protecting People and the Environment


ACCESSION #: 9707230016



NOTE:     This text document was processed from a scanned

          version or an electronic submittal and has been

          processed as received.  Some tables, figures,

          strikeouts, redlines, and enclosures may not have

          been included with this submittal, or have been

          omitted due to ASCII text conversion limitations.  In

          order to view this document in its entirety, you may

          wish to use the NUDOCS microfiche in addition to the

          electronic text.



                    Information & Support Services

                    P.O. Box 3707

                    Seattle, WA 98124-2207



July 15, 1997

G-1151-SJA-97-339



Document Control Desk

United States Nuclear Regulatory Commission

Washington, D.C. 20555



Reference: a)  Boeing Letter G-1151-RSO-92-365 dated August 31, 1992; R.

               S. Orr to the NRC Operations Center



           b)  NRC Letter Docket No. 99901227 dated August 12, 1992; L.

               J. Norrholm to R. S. Orr; Subject: Response to 10 CFR 21

               Inquiry



Dear Sir or Madam:



In accordance with the reference correspondence and 10 CFR 21, Boeing is

sending the NRC the attached error notice(s) received from our former

software suppliers.  Because of unknown current addresses, the following

former customers were not notified:



     Reactor Controls, Inc.



     Echo Energy Consultants, Inc.



     Nuclear Applications and Systems Analysis Company (Japan)



     Nuclear Power Services



Error notices have been sent to our other former customers.



Very truly yours,



Sandra J. Andrews

Nuclear Administrator

Phone: (206) 865-6248

FAX: (206) 865-4851

Mail Stop: 7A-33, or

e-mail: Sandra.Andrews@PSS.Boeing.com



Enclosure(s): ANSYS Class3 Error Reports 97-16 through 97-34



ANSYS "Trade Mark"

                              ANSYS, Inc.

                              Southpointe

                              275 Technology Drive

                              Canonsburg, PA 15317



                                   July 2, 1997



Dear Class3 Error Recipient:



          Enclosed you will find ANSYS Class3 Error Reports 97-16 thorugh

97-34.



          Please note that the information supplied on the back of each

O@ ANSYS Class3 Error Report regarding product and release identification

has been modified.  The modified release identifier and product

identification information follows:



     Major release level changes indicate that new features have been

     added to the program and that some level of program architecture

     change has occurred.  Minor release level changes indicate that new

     features have been added to the program but files are upwardly

     compatible.  All known error fixes are included in both minor and

     major releases.  The build date corresponds to the date the program

     was created.  Special versions may be provided to circumvent an

     error and are identified by build date.  Special versions are not

     general releases to all@ANSYS licensees, since they typically

     represent error corrections occurring only on one system, a subset

     of our customers who have specific devices.



     When a release identifier on a Class3 Error Report does not include

     a build date, all build dates for the indicated release level are

     included.  When a release identifier for first incorrect version

     explicitly includes a build date, the release level with the

     indicated build date as well as all earlier build dates for that

     release level are affected.  When a release identifier for corrected

     in explicitly includes a build date, the release level with the

     indicated build date as well as all subsequent build dates contains

     the correction.



     The ANSYS family of component products occasionally undergoes name

changes between releases and/or changes in functionality of derived

products.  To minimize the potential for confusion in these areas, unless

otherwise noted on the Class3 Error Report.  the error report applies to

all ANSYS family products that contain or describe the feature in the

designated release(s).



     Also enclosed you fill find ANSYS Class3 Error Summaries for Rev.

5.2 and Release 5.3 of the ANSYS program.  For your convenience, these

are sorted both by keyword and Class3 Error Report number.



                                   Sincerely,



                                   ANSYS, Inc.



                                   William J. Bryan

                                   Quality Assurance Manager



                  ANSYS Release Identifier Description



ANSYS release identifiers consist of a major release level, a minor

release level, a correction and a build date.  An example of how this is

constructed is shown below:



     Figure omitted.



Major release level changes indicate that new features have been added to

the program and that some level of program architect change and/or file

structure may have occurred.  Minor release level changes also indicate

that new features have been added to the program, but files are upwardly

compatible.  All known error fixes are included in both minor and major

releases.  The build date corresponds to the date the program was

created.  Special versions may be provided to circumvent an error and are

identified by build date' Special versions are not general releases to

all ANSYS licensees, since they typically represent error corrections

occurring only on one system, a subset of our customers who have specific

graphics devices, etc.



When a release identifier on a Class3 Error Report does not include a

build date, all build dates for the indicated release level -are

included.  When a release identifier for FIRST INCORRECT VERSION

explicitly includes a build date, the release level with the indicated

build date as well as.  all earlier build dates for that release level

are affected.  When a release identifier for CORRECTED IN explicitly

includes a build date, the release level with the indicated build date as

well as all subsequent build dates contain the correction.



For example, a Class3 Error Report with "5.3 UP100396" for

FIRST.INCORRECT VERSION and "5.5 UP063098" for "CORRECTED IN" would apply

to all 5.3 releases with a build date UP 100396 or later, all 5.4

releases (regardless of build date) and all 5.5 releases with a build

date earlier than UP063098.



The ANSYS release identifier(s) shown under "corrected in" on the front

side of Class3 Error Reports indicates the first possible release that

contains the correction.



An identifier indicated under "corrected in" does not guarantee that a

general distribution of that release of ANSYS will occur.  It does

indicate that the correction is known and implemented in that or any

subsequent release.



                          Product Applicability



The ANSYS family of component products occasionally undergoes name

changes between releases and/or changes in the functionality of derived

products (such as ANSYS-PC/LINEAR).  To minimize the potential for

confusion in these areas, unless otherwise noted on the front side of the

Class3 Error Report, the error report applies to all ANSYS family

products (including standalone component products) that contain the

described feature(s) in the designated release(s).



Page 1 of 2

                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-16



KEYWORDS:           *_/MOONEY      *_/EVAL   *_/HYPERELASTICITY



DESCRIPTION OF ERROR:



     The hyperelasticity commands MOONEY and EVAL have the following

errors:



1.   The LTYPE field description on the MOONEY command is incorrectly

documented. The correct description for ANSYS release (5.1, 5.2 and 5.3)

is as follows:



          1    Uniaxial test data (Tension or Compression) only.

          2    Equibiaxial test data (Tension or Compression) only.

          -    (Note that 3 is not used.)

          -    (Note that 4 should not be used.  Use of LTYPE=4 will

               produce incorrect results.)

          -    (Note that 5 should not be used.  Use of LTYPE=5 will

               produce incorrect results.)

          6    Uniaxial test data (Tension or Compression) and

               Equibiaxial test data (Tension or Compression).

          7    Uniaxial test data (Tension or Compression) and Shear test

               data (Tension or Compression).

          8    Equibiaxial test data (Tension or Compression) and Shear

               test data (Tension or Compression).

          9    Uniaxial test data (Tension or Compression), Equibiaxial

               test data (Tension or Compression) and Shear test

               data.(Tension or Compression).



2.   There are two errors with sorting of the test data which cause

     plotting errors:



     1.   The stress and strain data were independently sorted into

          SORTSS and SORTSN arrays.  As a result, stress-strain curves

          with negative slopes may not be appropriately plotted by the

          SORTSS and SORTSN arrays.



     2.   Different types of test data (uniaxial, equibiaxial and shear)

          are mixed while sorting and stored in SORTSS and SORTSN arrays.



3.  The EVPARM field description on the command EVAL is incorrectly

documented. The correct description is as follows:



     The type of hyperelastic equations (mode of deformation) to be used

     in the evaluation:



     1    Uniaxial (Tension or Compression) equations.

     2    Equibiaxial (Tension or Compression) equations.

     3    Shear (Planar Tension or Compression) equations.



TYPICAL GUI Path(s):



Main Menu>Preprocessor>Material Props>Mooney-Rivlin>Calc Constants

Main Menu>Preprocessor>Material Props>Mooney-Rivlin>Eval Constants



Page 2 of 2

                      ANSYS*_/ CLASS3 ERROR REPORT

                                                          ERROR NO: 97-16



FIRST INCORRECT VERSION(S):*_/          CORRECTED IN:*_/



Rev.  5.1                               Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Follow the description given above.



COMMENTS:



     In ANSYS 5.4, the above errors have been corrected as follows:



1.  The LTYPE field is redundant and will be ignored.  The correct test

data type will be determined from the STRAIN and STRESS arrays as

documented in the MOONEY command.



2.  The sorting errors are corrected.  The corrected documentation will

describe the usage of the new sorting capability.



AUTHOR/CORRECTOR:                       DATE: April 28, 1997

                    Ashraf Ali



AUTHOR/CORRECTOR:                       DATE: April 28, 1997

                    Sekar Govindarajan



REVIEWED BY QA:                         DATE: April 28, 1997

                    William J. Bryan



APPROVAL:                               DATE: April 28, 1997

                    David Conover



*_/Unless noted otherwise, this report applies to all ANSYS family

products Which contain the described feature in the indicated Releases).

See the reverse side for details regarding product applicability.



Unless noted otherwise.  this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected "in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-17



KEYWORDS: ORTHOTROPIC MATERIALS   LSDYNA     POISSONS RATIO



DESCRIPTION OF ERROR:



     ANSYS/LS-DYNA has the following error in orthotropic material

property definition: 'Column Normalized' or minor Poissons ratio values

(NUXY, NUYZ and NUXZ) are not correctly transferred to LS-DYNA.

Erroneous values are then used in the LS-DYNA solution.



TYPICAL GUI PATH(S):



Preprocessor>Material Properties



FIRST INCORRECT VERSION(S):*_/      CORRECTED IN:*_/



ANSYS/LS-Dyna Release 5.3           ANSYS/LS-Dyna Release 5.4

                                    Release 5.3 UP030797



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Users who are familiar with the format of the "Jobnam.K" LS-DYNA

file may edit the file, correct the material property values, then run

the LS-DYNA solution outside of ANSYS.



COMMENTS:



     Note also that 'Row Normalized' or major Poissons ratio values

(PRXY, PRYZ and PRXZ) do not work properly and produce an error message

and terminate the program.



AUTHOR/CORRECTOR:                       DATE: April 28, 1997

                    Ashraf Ali



REVIEWED BY QA:                         DATE: April 28, 1997

                    William J. Bryan



APPROVAL:                               DATE: April 28, 1997

                    David Conover



-------------

*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                      ANSYS*_/ CLASS3 ERROR REPORT



                                                          ERROR NO: 97-18



KEYWORDS: LSDYNA         SOLID164       EDLOAD         PRESSURE



DESCRIPTION OF ERROR:



     The EDLOAD command does not correctly apply pressure loads to

pressure faces 1 and 2 (Ikey=1 and 2 on the EDLOAD command) of SOLID164

elements.



TYPICAL GUI PATH(s):



Main Menu>Solution>Loading Options>Specify Loads



FIRST INCORRECT VERSION(S):*_/      CORRECTED IN:*_/



ANSYS/LS-Dyna Release 5.3           ANSYS/LS-Dyna Release 5.4

                                    Release 5.3 UP030797



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



COMMENTS:



     SOLID164 is used in explicit dynamics analyses (ANSYS/LS-DYNA) only.



AUTHOR/CORRECTOR:                            DATE: April 28, 1997

                         Ashraf Ali



REVIEWED BY QA:                              DATE: April 28, 1997

                         William J. Bryan



APPROVAL:                                    DATE: April 28, 1997

                         David Conover



--------------

*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after 'corrected in' are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-19



KEYWORDS: GUI       MODAL     PRESTRESSED         UPCOORD



DESCRIPTION OF ERROR:



     When setting the "set displacements to zero" KEY to ON to update

coordinate system for modal analysis [UPCOORD] in the Graphical User

interface.  KEY (to set displacements to zero) is erroneously set to OFF

and FACTOR (to multiply displacements by) is erroneously set to a near-

zero value.



TYPICAL GUI PATH(S):



Preproc>Loads>Other>Update Coord Sys

Solution>Other>Update Coord Sys



FIRST INCORRECT VERSION(S):*_/                    CORRECTED IN:*_/



Release 5.3                                       Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Enter the correct UPCOORD command manually in the input window

(typically UPCOORD,1,ON for prestressed modal analysis).



     For any case where this error has been encountered: the erroneous

command UPCOORD, ON will be written on the log file.  The log file may be

edited to correct the UPCOORD command typically UPCOORD,1,ON for

prestressed modal analysis), then used as input to re-run the analysis.



COMMENTS:



     This is an error in the Graphical User Interface (GUI) only.  The

UPCOORD command functions correctly.



     Setting the "update coordinate system in modal analysis" key to ON

is typically done for prestressed modal analysis.



AUTHOR/CORRECTOR:                            DATE: April 28, 1997

                         Ron Werkmeister



REVIEWED BY QA:                              DATE: April 28, 1997

                         William J. Bryan



APPROVAL:                                    DATE: April 28, 1997

                         David Conover



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                      ANSYS*_/ CLASS3 ERROR REPORT



                                                          ERROR NO: 97-20



KEYWORDS:      PLANE25   ELEM25    TEMPERATURES   NONLINEAR



DESCRIPTION OF ERROR:



     All results are incorrect for any nonlinear analysis which uses:



     PLANE25 (4 node axisymmetric-harmonic structural solid) with extra

     displacement shapes (KEYOPT(2)=0) [Default],



and temperature loading,



and the iterative (Newton-Raphson) solution technique.



TYPICAL GUI PATH(S):



Main Menu>Preprocessor>Element Type>Add/Edit/Delete[Add][Axi-har4node25]

Main Menu>Solution>Apply>Temperature

Main Menu>Solution>Analysis Options [SSTIF][PSTRES]



FIRST INCORRECT VERSION(S):*_/               CORRECTED IN:*_/



Rev.  5.0                                    Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Suppress extra displacement shapes for the PLANE25 elements

(KEYOPT(2)=1) or use PLANE83 elements rather than PLANE25.



COMMENTS:



     Stress stiffening automatically uses the iterative (Newton-Raphson)

solution technique.



AUTHOR/CORRECTOR:                            DATE: April 28, 1997

                         Peter Kohnke



REVIEWED BY QA:                              DATE: April 28, 1997

                         William J. Bryan



APPROVAL:                                    DATE: April 28, 1997

                         David Conover



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-21



KEYWORDS: SOLID5   SOLID98   THERMAL ANALYSIS   RAMPED B.C.  HEAT FLUX



DESCRIPTION OF ERROR:



     SOLID5 and SOLID98 produce incorrect results for cases with ramped

heat flux loading (SFxx commands with HFLUX surface load label KBC.0

[default]).



TYPICAL GUI PATH(S):



Main Menu>Solution>Apply>Heat Flux



FIRST INCORRECT VERSION(S):*_/               CORRECTED IN:*



Release 5.3                                  Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



      Instead of ramping B.C.s, apply them as a series of smaller stepped

loads or if only a thermal analysis (no multi-field effects), use SOLID70

or SOLID87 elements.



COMMENTS:



     Loads are ramped by default [KBC,0] during a solution containing

multiple substeps.



AUTHOR/CORRECTOR:                            DATE: April 28, 1997

                    Subhasish Roy Choudhury



REVIEWED BY QA:                              DATE: April 28, 1997

                    William J. Bryan



APPROVAL:                                    DATE: April 28, 1997

                    David          Conover



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in' are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-22

KEYWORDS:                     SHELL181



DESCRIPTION OF ERROR:



     SHELL181 may produce incorrect results, because of an uninitialized

variable.  The error is highly system and model dependent.  This error

may cause a run time abort, erroneous results or may have no affect

depending on the data in the memory location that is used by the

uninitialized variable.



FIRST INCORRECT VERSION(S):*_/          CORRECTED IN:*_/



Release 5.3                             Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Perform a dummy static solution with pressure = 0 applied to ALL

faces of SHELL181 elements and constrain all DOF (this will initialize

the variable), then remove the pressures and DOF constraints, apply the

desired loading, boundary conditions and continue the analysis as usual.



COMMENTS:



     In cases where a pressure load has been applied to SHELL181

elements, it is more likely for this undefined variable to contain

erroneous numerical data which will cause erroneous results rather than a

run time abort.



AUTHOR/CORRECTOR:                             DATE: April 28, 1997

                    Grama Bhashyam



REVIEWED BY QA:     William J. Bryan         DATE: April 28, 1997



APPROVAL:                                     DATE: April 28, 1997

                    David Conover



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT"



                                                          ERROR NO: 97-23



KEYWORDS: LSDYNA    CP   D    COUPLED NODES       CONSTRAINT



DESCRIPTION OF ERROR:



     Incorrect results are produced in an LS-DYNA solution for any case

where a constraint (D command) is applied to a degree of freedom that is

used in a coupled set (CP command).



TYPICAL GUI PATH(S):



CP Command: Preprocessor>Coupling/Ceqn>Couple D0Fs

D Command: Preprocessor>Loads>-Constraints-Apply>On Nodes



FIRST INCORRECT VERSION(S):*_/                CORRECTED IN:*_/



Release 5.3 ANSYS/LS-DYNA                    Release 5.4 ANSYS/LS-DYNA



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Use the D command alone to explicitly specify the needed constraints

on degrees of freedom rather than a combination of D and CP commands on

the same degree of freedom label.



For example, use the following:

cp,3,uz.1,2

d,1,ux,0

d,1,uy,0

d,2,ux,0

d.2,uy,0



instead of the following:

cp,1,ux,1,2

cp,2,uy,1,2

cp,3,uz,1,2

d,1.ux,O

d,1,uy,O



COMMENTS:



     This error has been seen to produce incorrect numerical results in

some cases and obviously incorrect results (such as "not a number" [nan]

in the output) in other cases.



AUTHOR/CORRECTOR-:                           DATE: May 15, 1997

                        Ashraf Ali



REVIEWED BY QA:                              DATE: May 15, 1997

                         William J. Bryan



APPROVAL:                                    May 15, 1997

                         John A. Swanson



*_/Unless noted otherwise report applies to all ANSYS family products

which contain the described feature in the indicated Release(s). See the

reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-24



KEYWORDS:      MAGNETICS      BIOT-SAVART         SOURC36



DESCRIPTION OF ERROR:



     Calculation of the Biot Savart field (BIOT command) for the Magnetic

Scalar Potential Formulations will ignore any source primitive geometry

(SOURC36 element) whose volume is less than 10e-15.



TYPICAL GUI PATH(S):



Main>Solution>Magnetics>Biot-Savart

Main>Preprocessor>Loads>Magnetics>Biot-Savart



FIRST INCORRECT VERSION(S):*_/                    CORRECTED IN:*_/



Rev. 5.2                                          Release 5.4

ANSYS/EMAG Rev. 5.2



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Modify the source primitive geometry so that its volume is greater

than 10e-15.  Alternatively, model the problem with larger dimensions

(such as millimeters).  This will require adjusting free-space

permeability UEMUNIT command) and/or adjusting material properties to

provide a consistent set of units throughout.



COMMENTS:



AUTHOR/CORRECTOR:                                 DATE: June 6, 1997

                             Miklos Gyimesi



REVIEWED BY QA:                                   DATE: June 6, 1997

                              William J. Bryan



APPROVAL:                                         DATE: June 6, 1997

                              John A. Swanson



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-25

KEYWORDS:      POST1          LCASE     LCDEF



DESCRIPTION OF ERROR:



     In POST1, the reading of data from a results file into the database

(LCASE command) will result in incorrect node and/or element results in

the database if performed according to the following sequence of

operations:



1.   An initial POST1 session is performed in which load case definitions

     (LCDEF) are assigned to a results file.



2.   The POST1 session is exited (FINISH).



3.   A subsequent POST1 session is performed in which data is read into

     the database from a results file (LCASE command) without a preceding

     SET or LCDEF having been performed in the cur/rent session.



TYPICAL GUI PATH(S):



Main Menu>General Postproc>Load Case>Read Load Case



FIRST INCORRECT VERSION(S):*_/                    CORRECTED IN:*_/



Rev. 5.0                                          Release 5.4

Component Products Rev. 5.0



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Issue a SET or LCDEF command in the second POST1 session before

reading results from a result file into the database (LCASE command).



COMMENTS:



     This error is such that the results quantities in the database for

any node or element may actually be the results from another node or

element in the model.



AUTHOR/CORRECTOR:                            DATE: June 6. 1997

                         Herb Mroz



REVIEWED BY QA:          William J. Bryan    DATE: June 6, 1997



APPROVAL:                John A. Swanson     DATE: June 6, 1997



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-26



KEYWORDS:      SPECTRUM  PSDMAV    RANDOM VIBRATION  WAVE

PROPAGATION



DESCRIPTION OF ERROR:



          In a random vibration analysis (ANTYPE, SPECTRUM with SPOPT,

PSD) using wave propagation or spatial correlation option (PSDWAV or

PSDSPL command) with base excitation (PFACT,,BASE.WAVE/SPATIAL), results

are incorrect if any of the excited base nodes (nodes with displacement

values set to 1.0) are used in any constraint equation (CE command).



TYPICAL GUI PATH(S):



Solution>Spectrum>Correlation>Traveling Wave or Spatial Correlat



FIRST INCORRECT VERSION(S):*_/               CORRECTED IN:*_/



Rev. 5.0                                     Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION":



     Replace the constraint equations with rigid beams.



COMMENTS:



     The static solutions performed for each base node assume a unit

displacement is applied through the constraint equation terms (instead of

zero as required, except if it is the node under consideration).



AUTHOR/CORRECTOR:                            DATE: June 6, 1997

                         David L. Conover



REVIEWED BY QA:                              DATE: June 6, 1997

                         William J. Bryan



APPROVAL:                                    DATE: June 6, 1997

                         John A. Swanson



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-27



KEYWORDS:           LSDYNA         SOLID164       ELEM164



DESCRIPTION OF ERROR:



     The element connectivity for degenerate wedge shape SOLID164

elements is not written properly to the LS-DYNA input file jobname.k and

may produce incorrect solutions.



TYPICAL GUI PATH(S):



Main Menu>Preprocessor>Element Type>Add/Edit/Delete



FIRST INCORRECT VERSION(S):*_/               CORRECTED IN:*_/



ANSYS/LS-DYNA Release 5,3                    ANSYS/LS-DYNA Release 5.4

                                             Release 5.3 UP030797



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Do not use degenerate prism shape of SOLID164.  If automatic mesher

produces degenerate prism shaped elements, convert them manually to a

number of tetrahedrons.



COMMENTS:



     The incorrect connectivity written to LS-DYNA input file is:

J,I,L,M,K,K,N.N.  The corrected connectivity is: J,I,M,N,K,L(=K),O,P(=O).



AUTHOR/CORRECTOR:                                 DATE: June 6, 1997

                         Ashraf Ali



REVIEWED BY QA:                                   DATE: June 6, 1997

                         William J. Bryan



APPROVAL:                                         DATE: June 6, 1997

                         John A. Swanson



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-28



KEYWORDS: CONSTRAINT EQUATIONS  UNSYMMETRIC MATRICES  FRONTAL

SOLVER



DESCRIPTION OF ERROR:



     Results are incorrect in an analysis using the frontal solver

(EQSLV,FRONT [default]) with constraint equations (CE command) when the

matrices are unsymmetric.



     Element types which produce unsymmetric matrices include:



BEAM4          3-D Elastic beam (with KEYOPT(7)=1)

INFIN9,47      Infinite boundary elements (with KEYOPT(2)=1

PIPE16         Elastic straight pipe (with KEYOPT(7)=1)

MATRIX27       Stiffness matrix (with KEYOPT(2)=1)

FLUID29,30     Acoustic fluids (with KEYOPT(2)=0)

PLANE55        2-D Thermal Solid (with KEYOPT(8)>0)

FLUID66        Coupled thermal-fluid pipe

SOLID70        3-D Thermal Solid (with KEYOP-r(8)>0)

SHELL181       Finite strain shell (with KEYOPT(S)=1)

CIRCU124       General circuit element with the following KEYOPT(l)

               values:

                    4 Independent voltage source

                    5 Stranded coil current source

                    6 2D Massive conductor voltage source

                    7 3D Massive conductor voltage source

                    9 Voltage-controlled current source

                   10 Voltage-controlled voltage source

                   11 Current-controlled current source

                   12 Current-controlled voltage source



TYPICAL GUI PATH(S):



Main Menu>Preprocessor>Coupling/Ceqn



FIRST INCORRECT VERSION(S):*_/                    CORRECTED IN:*_/



Release 5.3                                       Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Use the ICCG iterative solver (EQSLV, ICCG) instead of the frontal

solver.



AUTHOR/CORRECTOR:                                 DATE: June 6, 1997

                         David L. Conover



REVIEWED BY QA:                                   DATE: June 6, 1997

                         William J. Bryan



APPROVAL:                                         DATE: June 6, 1997

                         John A. Swanson



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature In the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-29

KEYWORDS:      EMAG           CIRCUIT        CIRCU124



DESCRIPTION OF ERROR:



     For a magnetic-circuit coupled analysis involving PLANE53 or SOLID97

and a large number of CIRCU124 elements, the frontal solution results may

be inaccurate or even erroneous depending on the problem and the

computing system.  This is typically manifested by a very large maximum

pivot.to minimum pivot ratio (printed in the solution output).  A maximum

pivot value of order 1.0e+16 or larger, and a minimum pivot value of

order 1.0e-16 or smaller have demonstrated inaccurate solutions.



TYPICAL GUI PATH(S):



Preprocessor>Element Type;add/edit/delete[add][Electric][CIRCU124]

Preprocessor>[Magnetic]>Vect Quad 4nod53]

Solution>Analysis Options>EQSLV>frontal



FIRST INCORRECT VERSION(S):*_/                CORRECTED IN:*_/



Rev. 5.2                                      Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Some tests show that this is most likely to occur in analyses where

a large number of CIRCU124 elements are connected in series to form a

loop.  Since the electric current in such a loop is the same for all

these circuit elements, it may help to couple all CURR DOF of the

corresponding finite element conductor regions into a single coupled node

set.  This increases the chance for the FRONTAL solver to pick up more

appropriate pivots during solution and therefore deliver correct results.

Minimum pivots using this technique for typical problems are on the order

of 1.0e-2 and have demonstrated consistent results across hardware

platforms.



COMMENTS:



     The error has been trapped in Release 5.4.  The error is targeted to

be corrected in Release 5.5.



AUTHOR/CORRECTOR:                                 DATE: June 6, 1997

                         Jian-She Wang



REVIEWED BY QA:                                   DATE: June 6, 1997

                         William J. Bryan



APPROVAL:                                         DATE: June 6, 1997

                         John A. Swanson



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-30



KEYWORDS: LUMPED MASS   CONSTRAINT EQUATIONS  REDUCED MODAL 

SUBSTRUCTURE



DESCRIPTION OF ERROR:



     Results are incorrect when using the lumped mass option (LUMPM, ON)

with constraint equations (CE command) in a reduced modal analysis

(ANTYPE, MODAL with MODOPT, REDUC) or in a substructure use pass that

uses the substructure mass matrix (generated with ANTYPE, SUBSTR with

SEOPT,,2).



     The substructure mass matrix is used in a modal, harmonic, or

transient analysis (ANTYPE=MODAL, HARM or TRANS) or in a static analysis

with acceleration effects (ACEL or OMEGA command).



TYPICAL GUI PATH(S):



Main Menu>Solution>Analysis Options

Main Menu>Preprocessor>Coupling Ceqn



FIRST INCORRECT VERSION(S):*_/                    CORRECTED IN:*_/



Rev. 5.0                                          Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Use the default mass matrix option (LUMPM, OFF [default]).



COMMENTS:



AUTHOR/CORRECTOR:                                 DATE: June 6, 1997

                         David L. Conover



REVIEWED BY QA:                                   DATE: June 6, 1997

                         William J.  Bryan



APPROVAL:                                         DATE: June 6, 1997

                         John A. Swanson



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-31



KEYWORDS:  MODE SUPERPOSITION   LARGE DEFLECTION   LVSCALE PSOLVE



DESCRIPTION OF ERROR:



     A mode superposition analysis (ANTYPE, HARM with HROPT, MSUP or

ANTYPE, TRANS with TRNOPT, MSUP) that uses element loads (LVSCALE

command) is incorrect if a prestressed modal analysis of a large

deflection solution (the PSOLVE procedure) was used for the modal

analysis.



TYPICAL GUI PATH(S):



Main Menu>Solution>Analysis Options



FIRST INCORRECT VERSION(S):*_/                     CORRECTED IN:*_/



Rev. 5.0                                           Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Use equivalent nodal loads in place of element loads.



COMMENTS:



     Element loads include thermal loads, pressures, and accelerations.



AUTHOR/CORRECTOR                             DATE: June 6, 1997

                    David L. Conover



REVIEWED BY QA:                              DATE: June 6, 1997

                    William J. Bryan



APPROVAL:                                    DATE: June 6. 1997

                    John A. Swanson



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-32



KEYWORDS:      PREP7     AREA MESH      QUADRILATERALS      FREE MESH



DESCRIPTION OF ERROR:



     Meshing an area with quadrilateral 2-D planar elements (such as

PLANE42) Or quadrilateral 3-D shell elements (such as SHELL63) can

produce overlapping elements.  Stress or other results from such a mesh

may be significantly in error.



     These overlapping element patches can only be created during a

"free" (as opposed to a "mapped".) quadrilateral meshing operation.  An

overlapping element patch will always contain at least one element whose

normal direction is opposite to that of its neighbors.  and also opposite

to that of the area.



     This error has been observed only in one sample mesh with an extreme

(30+:1) size transition for adjacent elements within a single area.



TYPICAL GUI PATH(S):



     Preprocessor>Mesh>Areas-Free



FIRST INCORRECT VERSION(S):*_/                    CORRECTED IN:*_/



Release 5.3                                       Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



1.   Avoid extreme element size transitions within a single area.  This

     makes the occurrence of this error unlikely.



2.   Verify that all element normals are consistent by doing the

     following:



          a.   Download the macro "areatest.mac" from the ANSYS web site

               (http://www.ansys.com/Customer/Download).  Run the macro

               on the model.  Any problem elements will be identified by

               the macro.



       or b.   To detect manually temporarily convert all non-shell 2-D

               planar elements (if any) to shell elements using the ET

               command.  Use ET,n,63 (where n is the appropriate element

               type attribute number) for 4-noded elements such as

               PLANE25, PLANE42, PLANE55, etc. Use ET,n,93 for 8-noded

               elements such as PLANE77, PLANE82, etc. Plot all 2-0

               planar elements (now shells) with PowerGraphics ON

               (/GRA,POWER).  By default, this plots shell tops in cyan

               color and shell bottoms in black or purple.  Check if any

               element has normal directions opposite to that of its

               neighboring elements by looking for inconsistently

               oriented (different colored) shell tops and/or bottoms.

               Remember to switch element types back to the original

               settings before proceeding with the analysis.



      or c.    Plot elements with PowerGraphics OFF (/GRA,FULL), with 2D

               graphics, and with /NORM set to show only elements facing

               toward or away from you.



                        ANSYS CLASS3 ERROR REPORT



Page 2 of 2                                               ERROR NO: 97-32



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION: (cont.)



3.  If a flawed mesh is detected, clear the areas with overlapping

elements (ACLEAR) and remesh with different element size or division

specifications, or switch to all triangles (if appropriate for the

element type and analysis objectives).  Check the resultant mesh as

described above.



AUTHOR/CORRECTOR:                                 DATE: July 1, 1997

                         Matt Staten



REVIEWED BY QA:                                   DATE: July 1, 1997

                         William J. Bryan



APPROVAL:                                         DATE: July 1, 1997

                         David Conover



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first Incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-33



KEYWORDS:      WINDOWS NT     WINDOWS 95          /COPY



DESCRIPTION OF ERROR:



     On Windows NT and Windows 95 systems the /COPY command may not copy

binary files correctly.  The file may only be partially copied or may be

corrupt and unusable.  Any subsequent operation that makes use of a

binary file resulting from /COPY may produce erroneous results.



TYPICAL GUI PATH(S):



Utility Menu>File>File Operations>Copy



FIRST INCORRECT VERSION(S):*_/                         CORRECTED IN:*_/



Rev. 5.0A                                              Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



          Use the /SYS command to copy binary files for Windows NT and

Windows 95 systems.



COMMENTS:



     This also affects Windows NT on the Dec Alpha machine.



AUTHOR/CORRECTOR:                                 DATE: June 26, 1997

                         Mike McGovern



REVIEWED BY QA:                                   DATE: June 26, 1997

                         William J. Bryan



APPROVAL:                                         DATE: June 26, 1997

                         David Conover



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



                 ANSYS "Trade Mark" CLASS3 ERROR REPORT



                                                          ERROR NO: 97-34



KEYWORDS:      MODE SUPERPOSITION       HARMONIC  TRANSIENT



DESCRIPTION OF ERROR:



     In a harmonic or transient mode superposition analysis (ANTYPE,HARM

with HROPT, MSUP or ANTYPE, TRANS with TRNOPT, MSUP), if a subset of

modes is specified to be used (MINMODE>1 on the HROPT or TRNOPT command),

the results are incorrect.



     The program uses the modes starting with the first mode rather than

the specified mode MINMODE.



TYPICAL GUI PATH(S):



Main Menu>Solution>Analysis Options



FIRST INCORRECT VERSION(S):*_/                         CORRECTED IN:*_/



Rev. 5.2                                               Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Set MINMODE to 1.



COMMENTS:



AUTHOR/CORRECTOR:                                 DATE: June 26, 1997

                         David Conover



REVIEWED BY QA:                                   DATE: June 26, 1997

                         William J. Bryan



APPROVAL:                                         DATE: June 26, 1997

                         Mark C. Ingrund



*_/Unless noted otherwise, this report applies to all ANSYS family

products which contain the described feature in the indicated Release(s).

See the reverse side for details regarding product applicability.



Unless noted otherwise, this error report also applies to all releases

after the first incorrect one and prior to the corrected release.  All

releases after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS release

identifiers.



Table "ANSYS 5.2 CLASS3 ERROR SUMMARY BY REPORT NUMBER" 3 pages, omitted.



Table "ANSYS 5.2 CLASS3 ERROR SUMMARY, KEYWORD SORT OF ALL REVISION

5.2

CLASS3 ERRORS, Date of this report: 6/26/97", 8 pages, omitted.



Table "ANSYS 5.3 CLASS3 ERROR SUMMARY BY REPORT NUMBER" 2 Pages, omitted.



Table "ANSYS 5.3 CLASS3 ERROR SUMMARY, KEYWORD SORT OF ALL REVISION

5.3

CLASS3 ERRORS, Date of this report: 6/26/97" 5 pages, omitted.



*** END OF DOCUMENT ***



Page Last Reviewed/Updated Thursday, March 29, 2012