United States Nuclear Regulatory Commission - Protecting People and the Environment

ACCESSION #: 9607150301

NOTE:     This text document was processed from a scanned
          version or an electronic submittal and was processed
          as received.  Some tables, figures, strikeouts,
          redlines, and enclosures are not included with this
          submittal, and are 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 8, 1996
G-1151-SJA-96-436

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

BOEING

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

     Tenera Engineering Services Gibbs & Hill, Inc.

Error notices have been sent to our other former customers.

Very truly yours,

Sandra J.  Andrews
Nuclear Administrator
G-1151 M/S 7A-33
(206) 865-6248

Attachment(s): ANSYS Class3 Error Reports 96-21, 96-22, 96-23, 96-24, 96-
               25, 96-26, 96-27, 96-28, 96-29, 96-30, 96-31, 96-32, 95-
               55R1

               ANSYS QA Notice QA96-05

               Revised Class3 Error Summary Report for Rev. 5.2

                         ANSYS, Inc.
                         201 Johnson Road         Telephone 412.746-3304
                         Houston, PA 15342-1300   Facsimile 412.746.9494

                         June 28, 1996

Dear Class3 Error Recipient:

     Enclosed you will find ANSYS Class3 Error Reports 96-21, 96-22, 96-
23, 96-24, 96-25, 96-26, 96-27, 96-28, 96-29, 96-30, 96-31, 96-32 and 95-
55 R1.  Also included is ANSYS QA Notice QA96-05.

     ANSYS Class3 Error Report 95-55 has been revised to give correction
status information.  Documentation has been corrected in the Release 5.3
Analysis Guide.

     ANSYS QA Notice QA96-05 is being issued to alert you of a potential
Class3 error when using superelement (MATRIX50) when coupled to a non
zero degree of freedom of another element.

     I have also attached a newly revised Class3 Error Summary Report for
Rev.  5.2.  An error appeared in the report dated 5/31/96.  Please
discard that copy and use the enclosed.

                                   Sincerely,

                                   ANSYS, Inc.

                                   William J.  Bryan
                                   Quality Assurance Manager

Attachments

    ANSYS [Registered Trademark] is a registered trademark of SAS IP

                  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.

     PC/LINEAR is equivalent to                   WS/LINEAR at Rev.
                                                  4.4A,
                                             and  ANSYS/LINEAR starting
                                                  at Rev. 5.0
                                             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. 5.0.

     PREPPOST  contains relevant errors           the full ANSYS product,
               shown for                          for included pre- and
                                                  postprocessing
                                                  functionality

     PC/MAGNETIC is equivalent to                 ANSYS/Emag starting at
                                                  Rev. 5.0A

            ANSYS [Registered Trademark] CLASS3 ERROR REPORT

                                                          ERROR NO: 96-21

KEYWORDS:      TRANSIENT      DAMPING        MULTI-FIELD

DESCRIPTION OF ERROR:

     Whenever a TEMP degree of freedom (DOF) exists in a full transient
analysis (ANTYPE, TRANS with TRNOPT,FULL) along with any structural DOFs,
any damping effects (ALPHAD, BETAD, or MP,DAMP) are ignored.

     A TEMP DOF exists whenever a thermal element or a multi-field
element with a TEMP DOF activated (by KEYOPT) is defined (ET command).

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

Rev. 5.2                                Release 5.3

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

COMMENTS:

     To include ALPHA and/or BETA damping, make sure the degree of
freedom label TEMP is not present in the analysis.  The ETLIST command
lists the active DOFs.

AUTHOR/CORRECTOR:                       DATE: June 26, 1996
                    Dave Conover

REVIEWED BY QA:                         DATE: June 26, 1996
                    William J. Bryan

APPROVAL:                               DATE: June 26, 1996
                    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 Trademark] CLASS3 ERROR REPORT

                                                          ERROR NO: 96-22

KEYWORDS: KGEN      KSYM      KTRA      KSEL      KSLL      KSLN

DESCRIPTION OF ERROR:

     If a keypoint generation operation (copy - KGEN, reflect - KSYMM, or
transfer - KTRA) redefines an existing keypoint that is unselected (KSEL,
KSLL, or KSLN) at the time of the operation, the solid model database
relationships may become unstable for future operations.

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

Rev. 5.0                                Release 5.3
Component Products Rev. 5.0A            Component Products Release 5.3

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

     Select all keypoints (KSEL,ALL) prior to performing any of the
described operations.

COMMENTS:

     In the case which revealed this behavior, a subsequent keypoint
merge (NUMMRG,KP) erroneously merged widely separated keypoints as a
direct result of the database defects.  Other possible implications of
the defective database may not be obvious.

AUTHOR/CORRECTOR:                       DATE: June 26, 1996
                    Scott Canann

REVIEWED BY QA:                         DATE: June 26, 1996
                    William J. Bryan

APPROVAL:                               DATE: June 26, 1996
                    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 Trademark] CLASS3 ERROR REPORT

                                                          ERROR NO: 96-23

KEYWORDS:      PLANE78        MODE>0         HFLUX

DESCRIPTION OF ERROR:

          Results are incorrect if:

     1.   PLANE78, the 8-node axisymmetric-harmonic thermal solid element
          is used:

and  2.   MODE is greater than zero (MODE command);

and  3.  one or more heat flux surfaces (e.g. SFE,,, hflux,,) is defined.

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

Rev. 5.0                                Release 5.3

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

          Use either:

     1.   PLANE75 if midside nodes are not needed;

or   2.   the SFE,,, conv,, capability, with a very low film coefficient
          and the product of the film coefficient and the bulk

          temperature representing the applied heat flux.

COMMENTS:

AUTHOR/CORRECTOR:                       DATE: June 26, 1996

                    Peter Kohnke

REVIEWED BY QA:                         DATE: June 26, 1996
                    William J. Bryan

APPROVAL:                               DATE: June 26, 1996
                    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 Trademark] CLASS3 ERROR REPORT

                                                          ERROR NO: 96-24

KEYWORDS:      POST1     HARMONIC       IMAGINARY SOLUTION

DESCRIPTION OF ERROR:

          POST1 incorrectly identifies the imaginary part of a harmonic
solution (ANTYPE,HARMONIC) as real if no SET command is issued and the
imaginary data is in the database.  Imaginary data is in the database if:

     1.   the program was not exited between solution and POST1;

or   2.   a RESUME is performed using a database in which the solution
          has been saved (/EXIT,SOLU or /EXIT,ALL).

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

Rev.  5.0                               Released 5.3
Component Products Rev. 5.0A            Component Products Release 5.3

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

     Use a SET command to load in the appropriate solution.

COMMENTS:

     Postprocessing without first using the SET command (operating on the
data existing in the database from the solution) is not documented nor
recommended.

     The DOF solution is not available in POST1 until a SET command is
issued.

AUTHOR/CORRECTOR:                       DATE: June 26, 1996
                    David L.  Conover

REVIEWED BY QA:                         DATE: June 26, 1996
                    William J. Bryan

APPROVAL:                               DATE: June 26, 1996
                    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 Trademark] CLASS3 ERROR REPORT

                                                          ERROR NO: 96-25

KEYWORDS: ELEM34    CONVECTION LINK     KEYOPT(3)=2    SFE

DESCRIPTION OF ERROR:

          If all of the following are true:

     1.   LINK34, the convection link, is being used with KEYOPT(3) = 2
          (define film coefficient using the SFE commands):

and  2.   three or more load steps are being used;

and  3.   the third or subsequent load steps ramp the film coefficient
          (KBC, 0) [default] with at least two substeps per load step;

then the film coefficient in the third and subsequent load steps
erroneously ramp from the value at the end of the first load step, rather
than the previous load step.  This causes all results after the second
load step to be incorrect.

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

Rev. 5.0                                Release 5.3
ANSYS/Thermal Rev. 5.0A                 ANSYS/Thermal Release 5.3

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

COMMENTS:

AUTHOR/CORRECTOR:                       DATE: June 26, 1996
                    Peter Kohnke

REVIEWED BY QA:                         DATE: June 26, 1996
                    William J. Bryan

APPROVAL:                               DATE: June 26, 1996
                    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 Trademark] CLASS3 ERROR REPORT

                                                          ERROR NO: 96-26

KEYWORDS: SHELL63   KEYOPT(3)=2  ALLMAN ROTATION  BUCKLING  STRESS
                                                            STIFFENING

DESCRIPTION OF ERROR:

          Results are incorrect for SHELL63 with the Allman in-plane
rotational stiffness (KEYOPT(3)=2) in any one of the following
situations:

     1.  In a buckling analysis (ANTYPE,BUCKLE):

or   2.   In a prestressed analysis (PSTRES,ON), including prestressed
          modal (ANTYPE,MODAL), harmonic (ANTYPE,HARM), or transient
          (ANTYPE,TRANS):

or   3.   In a nonlinear analysis with stress stiffening (SSTIF,ON) using
          the default tangent stiffness matrix (KEYOPT(2)=O).

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

Rev. 5.1                                Release 5.3
Component Products Rev. 5.1             Component Products Release 5.3

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

     Do not use KEYOPT(3)=2 or use SHELL43 instead.

COMMENTS:

AUTHOR/CORRECTOR:                       DATE: June 26, 1996
                    David L. Conover

REVIEWED BY QA:                         DATE: June 26, 1996
                    William J. Bryan

APPROVAL:                               DATE: June 26, 1996
                    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 Trademark] CLASS3 ERROR REPORT

                                                          ERROR NO: 96-27

KEYWORDS:                LCOMB               NUMSTR

DESCRIPTION OF ERROR:

     When combining adjacent lines (LCOMB command), the starting line
number set by the NUMSTR command is erroneously reset to 1.

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

Rev. 4.4                                Release 5.3
Component Products Rev. 4.4             Component Products Release 5.3

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

     Before using the LCOMB command, issue the command NUMSTR,STAT to get
the starting line numbering "VALUE".  Then immediately after the LCOMB
command, issue the command NUMSTR,LINE, "VALUE" to reset the starting
line number.

COMMENTS:

If the database is saved and resumed again, the starting line number is
set back to the value previously set by NUMSTR command.  This can result
in a discrepancy in line numbering between subsequent sessions using SAVE
and RESUME commands, and possible mismatches in loads and boundary
conditions.

AUTHOR/CORRECTOR:                       DATE: June 26, 1996
                    Hasan Ahmad

REVIEWED BY QA:                         DATE: June 26, 1996
                    William J. Bryan

APPROVAL:                               DATE: June 26, 1996
                    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 Trademark] CLASS3 ERROR REPORT

                                                          ERROR NO: 96-28

KEYWORDS: ELEM142  FLUID142  FLOTRAN  TETRAHEDRON  SF  SFE  HEAT
TRANSFER

DESCRIPTION OF ERROR:

     Thermal surface loads (SF and/or SFE command) are evaluated
incorrectly for tetrahedron shaped FLUID142 elements, which will
overpredict the heat transfer from specified film coefficient or heat
flux boundary conditions.

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

Rev. 5.1                                Release 5.3
ANSYS/FLOTRAN Rev. 5.1

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

     Use brick shaped FLUID142 elements at locations where surface loads
must be applied, or use temperature boundary conditions.

COMMENTS:

AUTHOR/CORRECTOR:                       DATE: June 26, 1996
                    Mike Normansell

REVIEWED BY QA:                         DATE: June 26, 1996
                    William J. Bryan

APPROVAL:                               DATE: June 26, 1996
                    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 Trademark] CLASS3 ERROR REPORT

                                                          ERROR NO: 96-29

KEYWORDS:      BOOLEAN             SUBTRACT            MESH

DESCRIPTION OF ERROR:

     The Boolean subtract commands (xSBx, where x = L, A, V, or W) allow
the user to subtract meshed entities.  This may result in invalid
topology cross references.

     Further operations on these entities may produce unexpected results.
For example, undesirable mesh mismatches could occur between neighboring
entities if one of them is cleared and meshed again.

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

Rev. 5.0A                               Release 5.3
Component Products Rev 5.0A             Component Products Release 5.3

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

     Avoid subtracting meshed entities whenever possible.  However, if
subtraction is performed after the entities are meshed, clear the mesh
and mesh the entities again.

COMMENTS:

     1.  The correction version does not allow Boolean subtract commands
on meshed entities.

     2.  Chapter 5 of ANSYS Modeling and Meshing Guide documents this
behavior.

AUTHOR/CORRECTOR:                       DATE: June 26, 1996
                    Hasan Ahmad

REVIEWED BY QA:                         DATE: June 26, 1996
                    William J. Bryan

APPROVAL:                               DATE: June 26, 1996
                    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 Trademark] CLASS3 ERROR REPORT

                                                          ERROR NO: 96-30

KEYWORDS:      GCGEN          CONTACT        ELEM48

DESCRIPTION OF ERROR:

     The GCGEN command will generate CONTAC48 elements with the wrong
orientation (i.e.  i,k,j instead of i,j,k) if the following sequence of
operations is used to generate the target surface:

     1.   An area in the global 2D plane (x,y) oriented such that its
          normal points in the negative Z direction, is meshed with SHELL
          elements (e.g., SHELL63, SHELL93, etc.):

and  2.   SHELL elements are converted to PLANE elements (e.g., PLANE42,
          PLANE82, etc.):

and  3.   CONTAC48 elements are then generated (GCGEN command) using the
          PLANE elements as the target surface (error is independent of
          element type used for contact surface).

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

Rev. 5.0                                Release 5.3

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

     Use PLANE elements, such as PLANE42, when defining 2D CONTACT
     elements.

COMMENTS:

AUTHOR/CORRECTOR:                       DATE: June 26, 1996
                    Steve Owen

REVIEWED BY QA:                         DATE: June 26, 1996
                    William J. Bryan

APPROVAL:                               DATE: June 26, 1996
                    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 alt 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 Trademark] CLASS3 ERROR REPORT

                                                          ERROR NO: 96-31

KEYWORDS:      FLUID66        ELEM66         HGEN           KBC,0

DESCRIPTION OF ERROR:

          Erroneous results are produced when using:

     1.   FLUID66 (thermal-fluid pipe);

and  2.   heat generation (e.g.  BF, BFE, BFUNIF etc.  with Lab=HGEN);

and  3.   ramped loading (KBC,O), while using more than one substep.

The program erroneously ramps heat generations of the second and
subsequent load steps from zero instead of the value at the previous load
step.

FIRST INCORRECT VERSION(S):*_/          CORRECTED IN:*_/
Rev. 5.0                                Release 5.3

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

     If possible, use multiple load steps rather than multiple substeps.

COMMENTS:

     Use of stepped boundary conditions (KBC,I) with the above situation
     is correct.

AUTHOR/CORRECTOR:                       DATE: June 26, 1996
                    Peter Kohnke

REVIEWED BY QA:                         DATE: June 26, 1996
                    William J. Bryan

APPROVAL:                               DATE: June 26, 1996
                    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 Trademark] CLASS3 ERROR REPORT

                                                          ERROR NO: 96-32

KEYWORDS:      PMETHOD        SHELL150       PRESSURE

DESCRIPTION OF ERROR:

     Pressure on face 6 (nodes I - L) of degenerate (triangle) SHELL150
elements is ignored.

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

Rev. 5.2                                Release 5.3

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

COMMENTS:

     If you use degenerate SHELL150 with edge pressure, check your
results carefully so that equilibrium with external and reaction forces
are maintained.

AUTHOR/CORRECTOR:                       DATE: June 26, 1996
                    Pakal Rahulkumar

REVIEWED BY QA:                         DATE: June 26, 1996
                    William J. Bryan

APPROVAL:                               DATE: June 26, 1996
                    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 Trademark] CLASS3 ERROR REPORT

                                                       ERROR NO: 95-55 R1

KEYWORDS:      POST1     ESEL           MULTIPLE SOLUTION

DESCRIPTION OF ERROR:

          POST1 results will be incorrect if the solution being post-
processed was performed on a subset (ESEL) of a model that was previously
solved using a different selected set of elements, and all of the
following are true:

     1.   ANSYS was not exited (/EXIT) between solutions or the resumed
          database contained the model solution data [Redline: from the
          previously solved set of elements] (/EXIT,SOLU or /EXIT,ALL);

and  2.   Any of the elements unselected for the solution are reselected
          in POST1.

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

Rev. 5.0                                [Redline: Release 5.3 Analysis
                                        Guide]
Component Products Rev. 5.0A

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

     Do not reselect any of the elements unselected for the solution or,
[Redline: alternatively,] remove the earlier solution from the database
(/EXIT or SAVE).

COMMENTS:

     [Redline: This limitation will be documented in the Analysis Guide.
(The Analysis Guide replaces the Procedures Manual at 5.3)]

     The error occurs because the results of the previous solution for
the unselected elements still reside in the database.

AUTHOR/CORRECTOR:                       DATE: June 26, 1996
                    David L. Conover

REVIEWED BY QA:                         DATE: June 26, 1996
                    William J. Bryan

APPROVAL:                               DATE: June 26, 1996
                    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 QA NOTICE

                                                       NOTICE NO: QA96-05

SUBJECT: MATRIX50   SUPERELEMENTS  COUPLED DEGREES OF FREEDOM

DESCRIPTION:

     This QA Notice describes a potential Class3 error for which the full
scope has not yet been determined.  When the full scope of this error is
determined, this QA Notice will be updated and re-issued along with a
Class3 Error Report, if required.

     In a superelement (MATRIX50) use run, if a superelement has a degree
of freedom (DOF) that is coupled (CP, CPINTF commands) to a DOF on any
other element (including another superelement), and that second DOF is
given a nonzero imposed value [D command], the resulting solution may be
incorrect.

AFFECTED VERSIONS: Net Yet Determined

SUGGESTED USER ACTION: Impose nonzero values of degrees of freedom only
on the first (master) node of the coupled set.

AUTHOR/CORRECTOR:                       DATE: June 26, 1996
                    Peter Kohnke

REVIEWED BY QA:                         DATE: June 26, 1996
                    William J. Bryan

APPROVAL:                               DATE: June 26, 1996
                    John A. Swanson

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

Table "ANSYS 5.2 CLASS3 ERROR SUMMARY KEYWORD SORT OF ALL REVISION 5.2
CLASS3 ERRORS Date of this report: 6/26/96" 3 pages omitted.

*** END OF DOCUMENT ***

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