United States Nuclear Regulatory Commission - Protecting People and the Environment


ACCESSION #: 9704240050



NOTE:     This text document was processed from a scanned

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          strikeouts, redlines, and enclosures may not have

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Information & Support Services

P.O.  Box 3707

Seattle, WA 98124-2207



April 16,1997

G-1151-SJA-97-172



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 97-01 through 97-15, and 96-

               45R1

               ANSYS QA Notice QA97-01

               ANSYS Support Coordinator Bulletin SCB97-01

               ANSYS Class3 Error Summary Reports for Releases 5.2 and

               5.3, sorted by error number and keyword



                                   ANSYS, Inc.

                                   Southpointe

                                   275 Technology Drive       APR 16 1997

                                   Canonsburg, PA 15317



                             April 14, 1997



Dear Class3 Error Recipient:



     Enclosed you will find ANSYS Class3 Error Reports 97-01 through 97-

15, 96-45 R1 and ANSYS QA Notice QA97-01.  Also included is ANSYS Support

Coordinator Bulletin SCB97-01.  These reports were issued in the first

quarter of 1997.



     Class3 Error Report 96-45 has been revised to provide more specific

information on load application.



     ANSYS QA Notice QA97-01 has been issued to alert users of the

limitations of the ASUM and VSUM commands.  SCB97-01 has been issued to

provide compatibility information of ANSYS 5.3 with Windows NT 4.0.



     Recently, ANSYS, Inc.  headquarters moved to a new location.  Our

main telephone number 412-746-3304 has remained the same.  However, all

direct dial numbers have changed.  The new fax number for the Quality

Assurance Group is 412-514-1991.



ANSYS, Inc.              William Bryan - QA Manager         412-514-2883

Southpointe              Ken Podlaszewski - Assoc. QA. Eng. 412-514-2930

275 Technology Drive     Bonny Podolek - Admin. Asst.       412-514-2858

Canonsburg, PA 15317 USA



     I would like to remind you of the various ways that ANSYS Inc.

provides Class3 error information.  Quarterly, Class3 errors are

delivered by mail to the ANSYS Support Coordinator listed on-your ANSYS

license agreement.  Please complete and return the attached change form

if there has been a change in personnel or an address change so that

these reports can be delivered promptly.



     For users desiring access to Class3 errors on a more timely basis

you can be added to our email distribution list.  To register for email

notification of reports, simply send an email request including your

email address, company name/address and ANSYS agreement number to

bonny.podolek@ansys.com.  If you are a subscriber to email distribution,

please keep us informed of any changes in your email address by emailing

bonny.podolek@ansys.com.



     Finally, Class3 Errors and QA Notices are posted on ANSYS's Internet

HomePage.  The address is http://www.ansys.com.  They are located in the

ANSYS Zones section of the HomePage under Customer.  The username to

enter this area is "customer" and the password is "ain1fm" (the acronym

for ANSYS is number 1 for me).



     For your convenience, also enclosed with this mailing you will find

Releases 5.2 and 5.3 ANSYS Class3 Error Summary Reports sorted both by

error number and keyword.



                                        Sincerely,



                                        ANSYS, Inc.



                                        William J.  Bryan

                                        Quality Assurance Manager



                                        ISO 9001 CERTIFICATION INCLUDES

                                             ALL COMMERCIAL PRODUCTS



                  ANSYS Revision Identifier Description



     ANSYS revision identifiers consist of a major revision level, a

minor revision level, a correction level, and occasionally a special

version level.  An example of how this is constructed is shown below:



                             Figure omitted



     Major revision level changes indicate that new features have been

added to the program and that some level of program architecture change

and/or file structure has occurred.  Minor revision 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 revisions.  Changes to the correction level indicate that it is

primarily an error correction release.  Special version identifiers

indicate that one or more additional minor changes have been made to the

program, normally to circumvent an error.  Special versions are not

general releases to all ANSYS licensees, since they typically represent

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

specific graphics devices, etc.



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

front side of this Class3 Error Report indicates the first possible

revision that could contain the correction.  A major program change

needed to fix an error can dictate that the next minor or major revision

will contain the fix rather than the next correction level.  For example,

when errors were being reported while Rev. 4.3A was the latest production

version, most Class3 error reports indicated that 4.3B was the "corrected

in" revision.  Others requiring significant code restructuring were

reported as fixed in 4.4. Rev. 4.3B was never released, but Rev. 4.4

contained all error corrections noted as fixed in 4.3B.



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

a general release of that revision of ANSYS will occur.  It does indicate

that the correction is known and implemented in the coding that would be

part of that general release.



                     Equivalent Product Identifiers



     The ANSYS family of component products occasionally undergoes name

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

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

confusion in these areas, the important product name equivalences

(similar program functionality and error content) are listed below.



     ANSYS/ED  contains all errors shown for the full ANSYS product,

                                             starting at Rev. 5.0. and

                                             beyond, unless otherwise

                                             noted.



     PREPPOST  contains relevant errors      the full ANSYS product, for

               shown for                     included pre- and

                                             postprocessing functionality



     ANSYS     Component Products is an      All component products that

               inclusive term for            were issued at the stated

                                             revision level(s)



     PC/LINEAR is equivalent to              WS/LINEAR at Rev. 4.4A,

                                        and  ANSYS/LinearPlus starting at

                                             Rev. 5.0A.



     PC/THERMAL is equivalent to             WS/THERMAL at Rev. 4.4A,

                                        and  ANSYS/THERMAL starting at

                                             Rev. 5.0A.



     PC/MAGNETIC is equivalent to            ANSYS/Emag starting at Rev.

                                             5.0A



                       ANSYS@ CLASS3 ERROR REPORT



                                                          ERROR NO: 97-01



KEYWORDS: SOLID MODEL BCs     ROTATED NODES       DA



DESCRIPTION OF ERROR:



     The transfer (SBCTRAN, DTRAN or SOLVE) of area symmetry or anti-

symmetry (D commands with Label SYMM or ASYM) solid model boundary

conditions to the finite element model.  may not be correct for nodes

that have been rotated.



TYPICAL GUI PATH(S):

Main Menu>Preprocessor>Loads>Apply>On Areas

Main Menu>Preprocessor>Loads>Apply>Displacement>On Areas

Main Menu>Solution>Apply>On Areas

Main Menu>Solution>Apply>Displacement>On Areas



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



Rev. 5.1                           Release 5.4

Component Products Rev. 5.1        Component Products Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Make sure that all nodes to which DA boundary conditions will be

transferred are not rotated.  This may be done by selecting the

appropriate area (ASEL,S ...), selecting all the nodes associated with

the area (NSLA,S,1), then un-selecting all nodes with rotation angles of

0.0 (NSEL, U, ANG, XY, 0.0: NSEL, U, ANG, YZ, 0.0; NSEL, U, ANG, ZX, 0.0)

and ensuring that no nodes are left in the selected set.  (NLIST should

show no THXY, THYZ or THXZ values.)



COMMENTS:



     Nodes may be rotated by various means such as the NROT, DSYMM,

NMODIF commands.



AUTHOR/CORRECTOR:                       DATE: January 22, 1997

                    Wa Kwok



REVIEWED BY QA:                         DATE: January 22, 1997

                    William J. Bryan



APPROVAL:                               DATE: January 22, 1997

                    John A. Swanson



*_/  If a product name is not ed in the "first incorrect version", the

full ANSYS program is implied.  For products not listed, this error does

not apply, but see the reverse side for equivalent product designations.



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

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

revisions 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 revision

identifiers.



               ANSYS[Registered copy] CLASS3 ERROR REPORT



                                                          ERROR NO: 97-02



KEYWORDS:      MAGNETICS      SENERGY        MACRO



DESCRIPTION OF ERROR:



     Stored magnetic energy calculated with the SENERGY command macro

will be incorrect for the following cases:



     1.   Permanent magnet elements with an assigned element coordinate

          system (ESYS command) that is other than the global Cartesian

          system.



or   2.   Three dimensional problems using the Magnetic Scalar Potential

          formulation (element types SOLID96, SOLID5, SOLID98) with

          current sources (element type SOURC36 or currents from coupled-

          field element types SOLID5, LINK68, SOLID69 or SOLID98).

          Energy from the current source (Hs field) is neglected.



TYPICAL GUI PATH(S):



     SENERGY:       Main Menu>General PostProc>Elec & Mag Calc

     ESYS:          Main Menu>Preprocessor>Attributes>Default Attribs



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



Rev.  5.2                          Release 5.4

ANSYS/EMAG Rev. 5.2                ANSYS/EMAG Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     For Item 1: Define permanent magnet elements with the default global

Cartesian element coordinate system.  Revise the coercive force

components (MP command, MGXX, MGYY, MGZZ material properties) to align

with the global Cartesian coordinate system.



MP:  Main Menu>Preprocessor>Material Props>Isotropic



COMMENTS:



     Incorrect energy is calculated in domains with constant permeability

(MP command, MURXX material property).  Energy in nonlinear regions

(defined by a BH curve) is correct.



     The integration limits for permanent magnet energy will be changed.

(See Theoretical Manual, equation 19.6-18.) The zero energy level is

presently defined at a value of B=0.  This will be changed in the

corrected version to a zero energy level defined at B=Br, where Br is the

residual induction of the permanent magnet.  The new integration limit

level is more in line with industry standards.  In addition, absolute

signs on the energy and co-energy calculations will  be removed (see

equations 19.6-18, 19.6-19).



AUTHOR/CORRECTOR:                       DATE: November 22, 1997

                    Dale Ostergaard



REVIEWED BY QA:                         DATE: November 22, 1997

                    William J.  Bryan



APPROVAL:                               DATE: November 22, 1997

                    John A.  Swanson



               ANSYS[Registered Copy] CLASS3 ERROR REPORT



                                                          ERROR NO: 97-03



KEYWORDS: LSDYNA              EDLOAD              RIGID BODY



DESCRIPTION OF ERROR:



     When defining rigid body loads (RBUX, RBUY, RBFX, etc. on EDLOAD),

the last load defined for each load label overwrites all previously-

defined loads for a particular load label.  In addition, the load curve

associated with that load is not necessarily the load curve defined with

that load.  The jobname.k file contains only the last load defined for

each load label, and a load curve which may not be associated with the

load listed.



     For example, assume the following input for two previously-defined

materials and the parameters time, time1, load, and load1:



     EDLOAD,ADD,RBUY,,1,time(1),load(1)

     EDLOAD,ADD,RBUY,,2,time1(1),load1(1)



     Only the second load defined [load1(i)] will be used in Solution or

written to the jobname.k file.  In addition, only one load curve will be

listed.



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



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



AUTHOR/CORRECTOR:                       DATE: January 22, 1997

                    Lynne Metzgar



REVIEWED BY QA:                         DATE: January 22, 1997

                    William J.  Bryan



APPROVAL:                               DATE: January 22, 1997

                    John A.  Swanson



*_/  If a product name is not included in the "first incorrect version",

the full ANSYS program is implied.  For products not listed, this error

does not apply, but see the reverse side for equivalent product

designations.



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

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

revisions 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 revision

identifiers.



               ANSYS[Registered Copy] CLASS3 ERROR REPORT



                                                         ERROR NO: 97-04



KEYWORDS: HARMONIC RESPONSE ANALYSIS    UNSYMETRIC MATRICES PIVOT

TERM



DESCRIPTION OF ERROR:



          The results may be incorrect for an analysis that:



     A.   contains one or more elements that use unsymmetric matrices*_/,

          and/or performs a full harmonic response analysis**_/ (ANTYPE,

          HARM with HAROPT, FULL),



and  B.   the equation solver reports the minimum pivot in the output

          file as being equal to 0 (zero).



*_/  The use of element types with unsymmetric matrices that may lead to

condition B are:

          1.   FLUID66        Coupled thermal-fluid pipe

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

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



**_/ The use of element types which in a harmonic response analysis

satisfy condition B alone include all of the above, as well as multi-

field elements which are not using all of the available fields.



The exception is CIRCU124, which does not have this error.



TYPICAL GUI PATH(S):



Main Menu>Solution



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



Rev.  4.3                               Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Impose D commands (Main Menu>Solution>Apply>(load type)>On Nodes) on

all unused degrees of freedom, so that the minimum pivot is no longer 0.



COMMENTS:



     This error has been seen only on one very large analysis.



     Zero pivots occur only when there are unused DOFs that are processed

by the solver.



AUTHOR/CORRECTOR:                       DATE: February 19, 1997

                    Peter Kohnke



REVIEWED BY QA:                         DATE: February 19, 1997

                    William J.  Bryan



APPROVAL:                               DATE: February 19, 1997

                    John A.  Swanson



*_/ If a product name is not incLuded in the "first incorrect version",

the full ANSYS program is implied.  For products not listed, this error

does not apply, but see the reverse side for equivalent product

designations.

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

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

revisions 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 revision

identifiers.



               ANSYS[Registered Copy] CLASS3 ERROR REPORT



                                                          ERROR NO: 97-05



KEYWORDS: STRUCTURAL ANALYSIS      PCG SOLVER     IMPOSED DOF



DESCRIPTION OF ERROR:



     When the PCG solver (PowerSolver) (EQSLV, PCG command) is used with

a non-zero imposed displacement (D, DK, etc., commands) as a loading, the

computed displacement solution may have a larger inaccuracy than the

user-specified tolerance (Toler field on the EQSLV command) indicates.



     This only occurs when the coefficients of the stiffness matrix are

of the order of 1.0E7 and higher, a situation which can occur in a

structural analysis.



TYPICAL GUI PATH(S):



     MainMenu>Preprocessor>Loads>Apply>Displacement

     MainMenu>Preprocessor>Loads>Analysis Options

     MainMenu>Solution>Analysis Options



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



Rev.  5.1                               Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Use a tighter tolerance in the second field of the EQSLV command.

Typically this tolerance should be in the range of 1.0E-11 to 1.0E-14

when non-zero imposed displacements are applied.  The corrected version

(Release 5.4) will automatically adjust the reference norm to achieve the

proper accuracy as user-specified in the EQSLV command.



COMMENTS:



AUTHOR/CORRECTOR:                       DATE: February 19, 1997

                    Yong Cheng Liu



REVIEWED BY QA:                         DATE: February 19, 1997

                    William J. Bryan



APPROVAL:                               DATE: February 19, 1997

                    John A.  Swanson



*_/ If a product name is not included in the "first incorrect version",

the full ANSYS-program is implied.  For products not listed, this error

does not apply, but see the reverse side for equivalent product

designations.



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

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

revisions 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 revision

identifiers.



               ANSYS[Registered Copy] CLASS3 ERROR REPORT



                                                          ERROR NO: 97-06



KEYWORDS: MAGNETICS      HARMONIC       CIRCUIT        ELEM124



DESCRIPTION OF ERROR:



     Results are incorrect for harmonic analyses (ANTYPE, Harmic) of

electric circuits involving inductors (CIRCU124, KEYOPT(1)=1) or mutual

inductors (CIRCU124, KEYOPT(1)=8), if more than one load step or substep

is used.



TYPICAL GUI PATH(S):



     MainMenu>Solution>New Analysis>Harmonic



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



Rev.  5.2                               Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     For an electric circuit having inductors or mutual inductors,

perform a harmonic analysis for ONE frequency, and then go to POST1 to

view results.



COMMENTS:



AUTHOR/CORRECTOR:                       DATE: February 19, 1997

                    Jian-She Wang



REVIEWED BY QA:                         DATE: February 19, 1997

                    William  J.  Bryan



APPROVAL:                               DATE: February 19, 1997

                    John A.  Swanson



*_/ If a product name is not included in the "first incorrect version",

the full ANSYS program is implied.  For products-not listed, this error

does not apply, but see the reverse side for equivalent product

designations.



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

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

revisions 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 revision

identifiers.



               ANSYS[Registered Copy] CLASS3 ERROR REPORT



                                                          ERROR NO: 97-07



KEYWORDS: MAGNETICS      VOLTAGE LOADING          PLANE53



DESCRIPTION OF ERROR:



     Solutions may be incorrect when ap lying zero voltage drop (VLTG

label in BFE command) to a voltage-fed strand2 coil region modeled with

PLANE53, KEYOPT(1)=2.



TYPICAL GUI PATH(S):



     MainMenu>Preprocessor>Loads>Apply>Voltage drop

     MainMenu>Solution>Apply>Voltage drop



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



Rev.  5.2                               Release 5.4

ANSYS/EMAG Rev. 5.2                     ANSYS/EMAG Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



1.   If applied voltage needs to be set to zero, apply a very small

     voltage drop (e.g., BFE, elem, VLTG, 1.0e-8).



2.   If there is no applied voltage to a coil region, avoid using

     KEYOPT(1)=2; use KEYOPT(1)=0 instead.



COMMENTS:



     This error may be system dependent.  It has only occurred on the IBM

RS6000 system version.  However, it may occur on other systems.



AUTHOR/CORRECTOR:                       DATE: February 19, 1997

                    Jian-She Wang



REVIEWED BY QA:                         DATE: February 19, 1997

                    William J. Bryan



APPROVAL:                               DATE: February 19, 1997

                    John A. Swanson



*_/ If a product name is not included in the "first incorrect version",

the full ANSYS program is implied.  For products not listed, this error

does not appLy, but see the reverse side for equivalent product

designations.



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

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

revisions 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 revision

identifiers.



               ANSYS[Registered Copy] CLASS3 ERROR REPORT



                                                          ERROR NO: 97-08



KEYWORDS:      INERTIA RELIEF           DROPPED MIDSIDE NODES



DESCRIPTION OF ERROR:



     The results of using inertia relief (IRLF command) are incorrect if

an element definition includes a dropped midside node followed by an

included midside node.  For example, if none or all midside nodes are

dropped, there is no error.



TYPICAL GUI PATH(S):



     MainMenu>Solution>Other>Inertia Relief

     MainMenu>Solution>Output Ctrls>Incl Mass Summary



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



Rev.  5.0                               Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     For 2-D meshes with transitions between regions not using and using

midside nodes, orient elements so that node P is always the dropped node.



COMMENTS:



AUrTHOR/CORRECTOR:                      DATE: February 19, 1997

                    Peter Kohnke



REVIEWED BY QA:                         DATE: February 19, 1997

                    William J. Bryan



APPROVAL:                               DATE: February 19, 1997

                    John A. Swanson



*_/ If a product name is not included in the "first incorrect version",

the full ANSYS-program is implied.  For products not listed, this error

does not apply, but see the reverse side for equivalent product

designations.



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

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

revisions 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 revision

identifiers.



               ANSYS[Registered Copy] CLASS3 ERROR REPORT



                                                          ERROR NO: 97-09



KEYWORDS:      RBE3           CONSTRAINT EQUATIONS



DESCRIPTION OF ERROR:



     The RBE3 command produces incorrect constraint equations if the

slave nodes do not lie on a plane which is normal to the line from the

master point to the centroid of the slave nodes.  The undocumented

CECHECK command may detect these incorrect constraint equations.



TYPICAL GUI PATH(S):



     This feature cannot be accessed directly in the GUI menu.  It must

be entered directly in the command input window.



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



Release 5.3                             Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Use the RIGID command or stiff beams to achieve the desired force

and moment transfer.



COMMENTS:



AUTHOR/CORRECTOR:                       DATE: February 19, 1997

                    John Swanson



REVIEWED BY QA:                         DATE: February 19, 1997

                    William J. Bryan



APPROVAL:                               DATE: February 19, 1997

                    David Conover



*_/ If a product name is not incLuded in the "first incorrect version",

the full ANSYS-program is implied.  For products not listed, this error

does not apply, but see the reverse side for equivalent product

designations.



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

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

revisions 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 revision

identifiers.



               ANSYS[Registered Copy] CLASS3 ERROR REPORT



                                                          ERROR NO: 97-10



KEYWORDS:      GUI       PIPE17    ELEM17         REAL CONSTANTS



DESCRIPTION OF ERROR:



     The real constant dialog box in the GUI for PIPE17 places some real

constant data in the wrong location.  If not changed, this will cause

incorrect results.



TYPICAL GUI PATH(S):



     Preprocessor>Real Constants>Add



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



Release 5.3                             Release 5.4

ANSYS/LinearPlus Release 5.3            ANSYS/LinearPlus Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Specify real constants for PIPE17 by typing in the command input

window using R, RMORE, or RMODIF commands.  List the real constants

(RLIST) to verify that they are correct.



COMMENTS:



AUTHOR/CORRECTOR:                       DATE: February 19, 1997

                    Ron Werkmeister



REVIEWED BY QA:                         DATE: February 19, 1997

                    William J. Bryan



APPROVAL:                               DATE: February 19, 1997

                    John A. Swanson



*_/ If a product name is not included in the "first incorrect version",

the full ANSYS-program is implied.  For products not listed, this error

does not apply, but see the reverse side for equivalent product

designations.



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

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

revisions 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 revision

identifiers.



               ANSYS[Registered Copy] CLASS3 ERROR REPORT



                                                          ERROR NO: 97-11



KEYWORDS: PLANE2    SOLID92   RAMPED BOUNDARY CONDITIONS    MULTIPLE

                                                            SOLUTIONS

DESCRIPTION OF ERROR:



     If the model



     1.   contains PLANE2 or SOLID92 element types



and  2.   the loading contains non-zero pressures, accelerations, or

          temperature loads



and  3.   the following sequence of actions occur:



               A.   the user enters the solution processor (/SOLUTION

                    command) and performs a single or multiple load step

                    analysis by issuing the "SOLVE" command then exits

                    the solution processor by issuing the "FINISH"

                    command



          and  B.   the user reenters the solution processor USOLUTION

                    command) again, and this load step contains more than

                    one substep and ramped boundary conditions are being

                    applied (the default)



then for the first load step of this reentry into solution processor any

applied loadings made up of non-zero pressures, accelerations, or

temperature loads will ramp from the loading values at the end of the

previous "SOLUTION" instead of ramping from zero for the above element

types.



NOTE: The applied displacements and nodal forces are ramped correctly.



TYPICAL GUI PATH:S):



     Main Menu>Preprocessor>Loads>Time/Frequency>Time&Substeps

     Main Menu>Solution>Time/Frequency>Time&Substeps

     Main Menu>Finish

     Main Menu>Solution>CurrentLS



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



Release 5.3                             Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Save the database (SAVE command) before the first solver, issue a

/CLEAR to clear the ANSYS database, then RESUME the database and solve.

Follow the same procedure for subsequent solutions.



     Alternatively, run the separate solve sequences as separate runs.



COMMENTS:



     This is an unusual loading procedure, but it is acceptable.



AUTHOR/CORRECTOR:                       DATE: April 2, 1997

                    Pakal Rahulkumar



REVIEWED BY QA:                         DATE: April 2, 1997

                    William J. Bryan



APPROVAL:                               DATE: April 2, 1997

                    John A. Swanson



               ANSYS[Registered Copy] CLASS3 ERROR REPORT



                                                          ERROR NO: 97-12



KEYWORDS: SUBSTRUCTURE   MATRIX50       DOF       MDOF      TRI FILE



DESCRIPTION OF ERROR:



     On 32 bit computer platforms, the generation pass of a substructure

solution with a substructure tri file greater than 8 GB produces an

incorrect substructure stiffness matrix.  This will result in solution

errors in the use pass.



TYPICAL GUI PATH(S):



Main Menu>Solution>>New Analysis>Substructuring



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



Rev.  5.2                               Release 5.4.



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Split a very large substructure into smaller ones to ensure each

substructure can only generate a tri file smaller than 8 GB in size.



COMMENTS:



     Typically, when active slave node DOF is greater than 170,000 or an

R.M.S.  wavefront size is greater than 6000, the tri file of the

underlying substructure will exceed the 8 GB limit on 32 bit computer

platforms.  The Cray 64 bit computer platform with internal files (/FTYPE

command) does not have this 8 GB limit on tri file size.



AUTHOR/CORRECTOR:                       DATE: April 2, 1997

                    Yong Cheng Liu



REVIEWED BY QA:                         DATE: April 2, 1997

                    William J. Bryan



APPROVAL:                               DATE: April 2, 1997

                    John A. Swanson



*_/ If a product name is not included in the "first incorrect version",

the full ANSYS-program is implied.  For products not listed, this error

does not apply, but see the reverse side for equivalent product

designations.



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

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

revisions 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 revision

identifiers.



               ANSYS[Registered Copy] CLASS3 ERROR REPORT



                                                          ERROR NO: 97-13



KEYWORDS:      PSD  BASE EXCITATION     RPSD      ABSOLUTE RESPONSE PSD



DESCRIPTION OF ERROR:



     For Power Spectral Density (PSD) spectrum analysis (SPOPT,PSD

command) with base excitation (PFACT command with Excit = BASE), if more

than one input PSD table is specified, then the absolute response PSD

computed in POST26 (RPSD command with DATUM = 1) will erroneously be

computed based only on the last PSD table specified.



TYPICAL GUI PATH(S):



Main Menu>TimeHist Postpro>Calc Resp PSD



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



Release 5.3                             Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     If the base excitations are independent of each other, apply each

single base excitation one at a time, then obtain the absolute response

PSD by superimposing the results.



COMMENTS:



     This error does not affect relative PSD computed in POST26 (RPSD

command with DATUM=2).



AUTHOR/CORRECTOR:                       DATE: April 2, 1997

                    Mu-Tsang Chen



REVIEWED BY QA:                         DATE: April 2, 1997

                    William J. Bryan



APPROVAL:                               DATE: April 2, 1997

                    John A. Swanson



*_/ If a product name is not included in the "first incorrect version".

the full ANSYS-program is implied.  For products not listed.  this error

does not apply.  but see the reverse side for equivalent product

designations.



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

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

revisions 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 revision

identifiers.



               ANSYS[Registered Copy] CLASS3 ERROR REPORT



                                                          ERROR NO: 97-14

KEYWORDS:                          PSD



DESCRIPTION OF ERROR:



     A PSD input curve with a very steep slope (about + 300 to 1) causes

problems with the curve fitting and results in very large and incorrect

results.



TYPICAL GUI PATH(S):



Main Menu>Solution>Spectrum>PSD vs Freq.



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



Release 5.3                             Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



COMMENTS:



     In ANSYS 5.3, the points chosen for least-square curve fit

(piecewise-linear PSDs in log-log scale need to be transformed into

polynomial PSD in regular scale) were determined by the beginning point

value of each segment and its slope.  In ANSYS 5.4, the points will be

determined by the beginning and end point values of each segment,

independent of the slope.



AUTHOR/CORRECTOR:                       DATE: April 2, 1997

                    Mu-Tsang Chen



REVIEWED BY QA:                         DATE: April 2, 1997

                    William J. Bryan



APPROVAL                                DATE: April 2, 1997

                    John A. Swanson



*_/ If a product name is not included in the "first incorrect version".

the full ANSYS program is implied.  For products not listed.  this error

does not apply, but see the reverse side for equivalent product

designations.



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

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

revisions 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 revision

identifiers.



               ANSYS[Registered Copy] CLASS3 ERROR REPORT



                                                          ERROR NO: 97-15



KEYWORDS:      NSLA           SELECT         AREA      NODES



DESCRIPTION OF ERROR:



     When:



     1.   selecting nodes associated with areas (NSLA command),



and  2.   requesting all nodes associated with the area (NKEY=1),



and  3.   if any of the lines that make up the area have no interior

          nodes meshed on them,



then a node not associated with the area(s) may be erroneously selected.

Note that subsequent operations on the selected set of nodes (such as

applying boundary conditions) may produce unexpected results.



TYPICAL GUI PATH(S):



Utility Menu>Select>Entities



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



Rev.  5.0                               Release 5.4

Component Products Rev.  5.0            Component Products Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Display and/or list nodes to verify that the correct nodes were

selected.  Use node unselects to unselect any erroneously selected nodes.



COMMENTS:



AUTHOR/CORRECTOR:                       DATE: April 2, 1997

                    David Conover



REVIEWED BY QA:                         DATE: April 2, 1997

                    William J. Bryan



APPROVAL:                               DATE: April 2, 1997

                    John A. Swanson



*_/ If a product name is not included in the "first incorrect version",

the full ANSYS-program is implied.  For products not listed.  this error

does not apply.  but see the reverse side for equivalent product

designations.



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

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

revisions 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 revision

identifiers.



               ANSYS[Registered Copy] CLASS3 ERROR REPORT



                                                       ERROR NO: 96-45 RI



KEYWORDS:      SURFACE LOADS       BODY FORCES         RAMPING



DESCRIPTION OF ERROR:



     Surface loads (SF family of commands) and body forces (BF family of

commands) will erroneously be ramped from zero for each load step instead

of from the previous load step values if the model contains PLANE2,

SOLID92, or any thermal element, and the loads were applied to any of

those elements as follows:



     1.   Surface loads were applied to the solid model using the SFL or

          SFA commands.



or   2.   Pressure or convection surface loads were applied to the finite

          element model with the previously documented EP, EC, PSF, or

          CVSF commands.



or   3.   The LSWRITE/LSSOLVE commands were used to specify the load

          steps having either surface loads or body forces.



TYPICAL GUI PATH(S):



Main Menu>Preprocessor>Loads>Apply

Main Menu>Solution>Loads>Apply



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



Release 5.3                             Release 5.4

Component Products Release 5.3          Component Products Release 5.4



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Apply loads to the finite element model using the SF or SFE

commands.  Run multiple load steps using multiple SOLVE commands rather

than LSWRITE and LSSOLVE.



COMMENTS:



AUTHOR/CORRECTOR:                       DATE: January 22, 1997

                    Christopher W. Aiken



REVIEWED BY QA:                         DATE: January 22, 1997

                    William J. Bryan



APPROVAL:                               DATE: January 22, 1997

                    John A. Swanson



*_/ If a product name is n the "first incorrect version", the full ANSYS

program is implied.  For products not listed, that apply, but see the

reverse side for equivalent product designations.



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

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

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

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

side of this sheet for additional information on ANSYS revision

identifiers.



                             ANSYS QA NOTICE



                                                       NOTICE NO: QA97-01



SUBJECT:       ASUM      VSUM           LIMITATION



DESCRIPTION:



     The User's Manual fails to document the following limitation of the

ASUM and VSUM commands.  ASUM and VSUM calculations for a very narrow

area or a very thin volume become inaccurate due to approximations

involved in the calculation when the ratio of the minimum to maximum

dimensions for any area involved falls below 0.01.



AFFECTED VERSIONS: Rev.  5.0A - Release 5.4 User Manual



COMMENTS:



     Subdivide the area or volume into a number of divisions until the

ratio of the minimum dimension becomes larger than 0.01.



AUTHOR:                                 DATE: January 22, 1997

                    Hasan Ahmad



REVIEWED BY QA:                         DATE: January 22, 1997

                    William J. Bryan



APPROVAL:                               DATE: January 22, 1997

                    John A. Swanson



                                                                 SCB97-01



                   ANSYS Support Coordinator Bulletin



KEYWORDS:      PC             WINDOWS NT 4.0



DESCRIPTION:



     The purpose of this bulletin is to provide ANSYS users with

information about the compatibility of ANSYS 5.3 with Windows NT 4.0.

Changes were made in Windows NT 4.0 such that the initial release of

ANSYS 5.3 (build UP071096) will not install.



The initial release of ANSYS 5.3 (build UP071096) was certified only on

Intel based PCs with Windows NT 3.51 and Windows 95.  The second release

of ANSYS 5.3 (build UP100396) was certified with Windows NT 3.5 1,

Windows NT 4.0, and Windows 95 on Intel based PCs.



AFFECTED VERSIONS: Release 5.3 (build UP071096)



SUGGESTED USER ACTION:



     If you are upgrading to Windows NT 4.0 on an Intel based PC, you

should contact your ANSYS Support Distributor (ASD) to obtain the second

release of ANSYS 5.3.  If necessary, as an interim measure, the user can

temporarily create shortcuts to run each of the executables in the

ansys53 /bin directory for the initial release.



COMMENTS:



     The ANSYS Installation and Configuration Guide for Release 5.3 for

the Windows NT and Windows 95 platform does not include the above

information.  Note that for Digital Alpha PCs, only Microsoft Windows NT

3.51 is supported by both releases of ANSYS 5.3.



Author:                                 Date: February 19, 1997

                    James A.  Pasquerell



Reviewed by QA.                         Date: February 19, 1997

                    William J.  Bryan



Approval:                               Date: February 19, 1997

                    John A. Swanson



Table "ANSYS 5.3 CLASS3 ERROR SUMMARY BY REPORT NUMBER"  3 pages omitted.



Table "ANSYS 5.2 CLASS3 ERROR SUMMARY BY REPORT NUMBER"  5 pages omitted.



*** END OF DOCUMENT ***



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