Delete the next 3 lines which invoke the SOS editor. Known Error CR 2319
Corrected Version 69
Abstract Static Analysis - PLOAD1 and SORT2 - Wrong Answers
Description
In SOL 24, the effects of distributed loading with PLOAD1 are not reflected in the element stress and force
output in the SORT2 format. The fix to this error requires changes to the SOL 24 DMAP which would necessitate all
user DMAPs to be modified. Since there are several possible avoidances it has been decided that it is in the
user's best interest to maintain the upward compatibility of the user's DMAPs and leave this error as a general
limitation.
One avoidance is to use SOL 61 or SOL 101. An alternate avoidance is to apply the following DMAP alter.
compile sol24 souin=mscsou noref nolist alter 176 SDRX CASECC,OEF1,OES1,GEOM2,GEOM3,EST,CSTM,MPT,DIT/ OEF1X,OES1X/S,N,NOX $ alter 178,178 SDR3 OUGV1,OPG1,OQG1,OEF1X,OES1X,/OUGV2,OPG2,OQG2,OEF2,OES Known Error CR 2322 Product MSC / MD Nastran Corrected Version GL
Abstract Documentation - MSGMESH Analyst's Gu - Incorrect Documentation
Description
On page 3-3 in the MSGVIEW portion of the MSGMESH Analyst's Guide, it states
that MSGVIEW plot sets are
printed in the the MSGMESH output. This print option was removed prior to the release of MSC/NASTRAN Version 64.
Known Error CR 2330
Product MSC / MD Nastran Corrected Version 69
Abstract Random Response Analysis - RANDPS - SWM 3002, Missing Output
Description
If multiple RANDPS entries appear in the Bulk Data with the same set identification
number (SID) and the
same subcases specified for J and K, then SWM 3002 will be issued and random
analysis data recovery will not be completed. A correction to this error was integrated into Version 65B and later systems but the fix is incorrect. The incorrect fix results in UFM 5418 whenever duplication of fields J,
Known Error CR 2330
K and X is encountered on any RANDPS entry. The code should check for duplication
of SID, J, and K.
This error has been corrected in Version 69.
Avoidance: An avoidance for systems prior to Version 65B is to specify unique SIDs for each RANDPS entry. In Version 65B and later systems the avoidance is to modify the X value (field 5) whenever there
are duplicates across fields 3,4, Known Error CR 2341
Product MSC / MD Nastran Corrected Version GL
Abstract Geometric Nonlinearity (SOL 64 - Follower Forces, SPC - Wrong Answers
Description
In SOL 64, follower forces are computed using the load requests of
the present iteration and the geometry of the previous iteration. However, the geometric effects on follower forces, implied by a SPCD request, is not reflected until the next iteration.
There is no known avoidance. Known Error CR 2375
Product MSC / MD Nastran Corrected Version 69
Abstract Documentation - XYPLOT, CDAMPi,CVISC - Missing Plot Output
Description
In the documentation for XYPLOTS, User's Manual Section 4, it implies the CDAMPi AND CVISCi elements are
treated exactly the same as CELASi AND CONROD elements, respectively for plot requests. However, General
Limitation 2028 states: "For modal formulations, element force output requests
for CVISCi and CDAMPi elements are
ignored, if the matrix method of data recovery is used." An avoidance is given for this General Limitation and is
applicable for XYPLOT output requests.
Avoidance: An avoidance is to request the mode displacement method by including PARAM,DDRMM,-1 in the Bulk
Data Deck. The XY output for damping and elastic elements must be requested
Product MSC / MD Nastran Corrected Version 66
Abstract Nonlinear Analysis - Follower Forces - Wrong Answers
Description
This error is related to Error 2237 but it occurs for all follower
force type loads, including thermal loads, in SOL 66. Wrong answers are produced when a stiffness matrix update and new load factor are computed simultaneously. This is likely to happen with the ITER (LSQN) and SEMI (SEMIQN) methods, since stiffness matrix updates are prescribed by these methods.
Avoidance: A possible avoidance is to use the AUTO method (with a large KSTEP, e.g., 20) to prevent any
stiffness matrix updates from occurring. Known Error CR 2378
Product MSC / MD Nastran Corrected Version GL
Abstract Eigenvalue Analysis - Lanczos - Unexplainable User Message
Description
If the Lanczos method is used for an eigenvalue analysis, the following termination message may be issued in
the eigenvalue analysis summary: NOT ALL EIGENVALUES FOUND IN RANGE. This
message is given when three consecutive shifts have failed to produce any new eigenvalues. (V65 only)
Avoidance: There is no known avoidance. The user should try rerunning the problem with a different frequency range in order to force the shift algorithm to select a different series of shift values. Please refer to Error 2571 for a related error.
Known Error CR 2383
Product MSC / MD Nastran Corrected Version 68
Abstract Heat Transfer - GP1 - UFM 2012
Description
Superelement solution sequences 74 and 89 fail to accept upstream superelements
when an SPOINT entry exists.
Avoidance: The avoidance is to change all SPOINT type entries to GRIDS entries.
Known Error CR 2388
Product MSC / MD Nastran Corrected Version 66
Abstract Documentation - - NASTRAN Will Not Execute
Description
VAX must have VMS 4.0 Operating System or greater in order to run MSC/65.
Avoidance: If clients have VMS 3.X Operating System installed and want to leave it at 3.X, they should use MSC/64. (VAX V65 only)
Known Error CR 2393
Product MSC / MD Nastran Corrected Version 69
Abstract Differential Stiffness and Buckling - GPSTR2 - Divide by zero
Description
If in SOL 5 a grid point stress output request is made above the subcase level, a machine dependent error
indicating divide by zero will be issued. (V65 only)
Avoidance: Grid point stress output requests should be placed within the first subcase only. In Version 66,
the user should use SOL 105. Known Error CR 2406
Product MSC / MD Nastran Corrected Version 70.5
Abstract Dynamic Response Analysis - SDAMPING - Wrong Answers, Missing Messages
Description
The SDAMPING Case Control command can select only one entry in the superelement
sequences. No warning
messages are issued that any subsequent SDAMP requests are being ignored.
The solution uses the initial SDAMP
request and produces plausible but wrong results. UM 2.3 description of the command has a qualified remark
directing the user to include multiple FREQ requests which needs a further qualification to indicate that it
applies only to the Rigid Formats. MSC/NASTRAN Version 68 will be enhanced
to support multiple SDAMP entries.
Solution
Sequences Unstructured or
Structured, then multiple restarts must be employed. Known Error CR 2414
Product MSC / MD Nastran Corrected Version 69
Abstract Transient Analysis - SOLs 27,31,69,72,109,112 - SORT1 Output Unavailable
Description
When performing either Direct Transient Response, SOL 27, or Modal Transient Response, SOL 31, if SORT1 output is requested SORT2 output will be obtained.
Avoidance: Either SOL 69 or 109 with PARAM,CURVPLOT,1 or SOL 72 or 112 with PARAM,CURVPLOT,1 and
PARAM,DDRMM,-1 may be substituted for SOL 27 and SOL 31 respectively. Else
one of the following alters must be included depending on the solution and PARAM,DDRMM option requested:
ALTER 449 $ SOL 27 JUMP LSORT1 $ ALTER 477,478 $ ALTER 481,481 $
ALTER 557 $ SOL 31 WITH DDRMM=-1 JUMP LSORT1 $
ALTER 586,586 ALTER 588,588
ALTER 524 $ SOL 31 WITH DDRMM=0 (DEFAULT) JUMP LBLDRM1 $ ALTER 586,586 $ ALTER 588,588 $ Known Error CR 2432 Product MSC / MD Nastran Corrected Version 70
Abstract Hydroelastic Analysis - VECPLOT/PLOT - SFM 4276
Description
If determination of the differential stiffness matrix is desired in a SOL 64 run with hydroelastic elements
present in the model, SFM 4276, Recovery Code 7777 will occur in the VECPLOT
Known Error CR 2432
and PLOT modules.
Avoidance: The following alter must be included to avert this problem. $ --- FOR MSC/64 & MSC/65 ---
$ MODIFIES THE SIL AND BDPDT TABLE FOR HYDROELASTIC ALTER 44,44 $ UNDEFORMED SHAPE PLOT
PLTTRAN GBGPDT,GSILS/BGPDP,SIP/V,N,LUSET/S,N,LUSEP $ TABPT BGPDP,SIP,GBGPDT,GSILS, // $
PLOT PLTPAR,GPSETS,ELSETS,CASECC,BGPDP,GEQEXINS,SIP,, GECTS,,/ PLOTX1/NSILS/LUSEP/S,N,JUMPPLOT/1/S,N,PFILE $
$
ALTER 163,163 $ FOR VECPLOT PL
Known Error CR 2443
Product MSC / MD Nastran Corrected Version 69
Abstract Frequency Response and Random - RANDOM - SFM 3002
Description
If in Random Analysis the referenced RANDPS entry references subcases that do not exist, SFM 3002 will be
issued indicating an EOF has been reached.
Avoidance: The user should check his input to insure the referenced subcases exist. If the user is using
superelements or attempting random analysis of the solution set, please refer to error numbers 2431 and 2471 for additional information.
Known Error CR 2452
Product MSC / MD Nastran Corrected Version 66
Abstract Miscellaneous - MCE1 - UFM 5303
Description
In MSC/NASTRAN II, if the [Rmm] matrix which defines the multipoint constraint equations is not diagonal, the
UDCOMP subroutine which is not available in MSC/NASTRAN II will be called resulting in UFM 5303.
Avoidance: In the coding of rigid elements the user can avoid off diagonal terms in the [Rmm] matrix by not
specifying degrees of freedom as dependent on one rigid element and independent
on another. In most practical
applications, this error cannot be avoided for the RBE3 element. Known Error CR 2462
Product MSC / MD Nastran Corrected Version 68
Abstract Documentation - Handbook for Superelement Analysis - Comp. Mode Synthesis
Description
The Handbook for Superelement analysis, Section 3.1.10, references an MSC "internal document" on component
mode synthesis. This document is now available as MSR-71, and may be ordered
in the same manner as other user
documentation. The decks for the examples referred to in Section 4.1 and 4.2 of MSR-71 will be included on the
delivery tape in Version 67.5 and later systems and will be named COMP4P1*.DAT
and COMP42*.DAT. However, the
method described in MSR-71 which utilizes SOL 41, 42, and 43 is no longer the preferred approach for component mode synthesis. These solutions are no longer maintained. The preferred approach is documented in a paper presented
at the 1990 World User's Conference entitled "Creation of and use of "Craig- Bampton"
Models using MSC/NASTRAN" written b Known Error CR 2471
Product MSC / MD Nastran Corrected Version GL
Abstract Frequency Response and Random - RANDOM - Wrong Answers
Description
Error 2423 and General Limitation 1602 instruct the user to duplicate requests
for random analysis of the solution set in SOL 71, once as a solution set request, ie. SDISP, and once as a nonsolution set request, ie. DISP. However, when more than one subcase is involved on the related RANDPS Bulk Data entry,
the PSDF results will incorrectly be that of only one subcase.
Avoidance: To get proper results the user must strictly adhere to the following
procedure:
1. You must make a case control request for the solution set variables desired, SDISP, SVELO or SACCE, with the SORT2 modifier. Physical output requests should not be included within the same run.
Known Error CR 2471 the ph Known Error CR 2496
Product MSC / MD Nastran Corrected Version 70
Abstract Documentation - HBDA, Dynamic Reduction - Poor Answers
Description
Documentation for the use of GDR, section 4.1 of the Handbook for Dynamic Analysis, instructs the user to use the defaults for NQDES, NIRV, and NIT, else accuracy or efficiency penalties will be experienced. It assures the user that all vibration modes below FMAX will be computed accurately if these procedures are followed. Although these recommendations are valid for most models, investigations have revealed models where these defaults are not adequate. This topic is discussed further in Section 5.1 of the Handbook for Dynamic Analysis. Models with many closely spaced roots and/or
a large number of roots requested are particularly susceptible to missed roots and loss of accuracy. The user should be aware that there are limitations
to the method and the number of accurate roots is dep Known Error CR 2503
Product MSC / MD Nastran Corrected Version 67.5
Abstract Aeroelastic Analysis - FA2 - SFM 3003
Description
In SOL 75 using the KE flutter method, piston theory aerodynamics, SFM 3003 will be encountered in the FA2
module. (IBM only)
Avoidance: No known avoidance is available. Known Error CR 2515
Product MSC / MD Nastran Corrected Version 69
Abstract Elements - BEND - Wrong Answers
Description
If the alternate form of the PBEND card is used and FSI is set to 2 or 3, incorrect answers will result.
FSI=2 will produce incorrect stresses. Whereas, FSI=3 applies a flexibility correction factor for a curved pipe under pressure rather than an equivalent straight pipe. This leads to poor answers for displacements.
Furthermore, the location of the four points chosen for stress output as documented in Section 1.3 of the User's Manual may not be the maximum stress
Avoidance: Other than using FSI set to 1, there is no known avoidance. Known Error CR 2554
Product MSC / MD Nastran Corrected Version 67
Abstract Geometric Nonlinearity (SOL 64 - - SFM 4275, SFM 4276
Description
Requests for displacements output only in a SOL 64 run may result in "SFM 4275 DURING A DB READ OPERATION"
followed by "SFM 4276 IONAST EC 1302". (Apollo V65, CRAY X-MP/COS V65A
only)
Avoidance: This problem is not yet fully understood. However, a request for additional output such as
SPCFORCE and ELFORCE in conjunction with the DISP request has averted the
problem on both machines where the problem has been discovered.
Known Error CR 2583
Product MSC / MD Nastran Corrected Version GL
Abstract Material Nonlinearity - NLITER - UWM 5409, UFM 4553, 4542
Description
If in material nonlinear analysis the structure is not subjected to any mechanical loads but is subjected to thermal loads, UFM 4542: NO LOAD INCREMENT
EXISTS FOR NONLINEAR SUBCASE may be output. This is a limitation of the design and will happen whenever the temperature loads cause no loads to be passed down to the l-set. For example, a symmetric flat plate supported on all sides or a simple beam supported on both ends subjected to only thermal
loads will produce the fatal message.
A possible alternative to UFM 4542 is some noise loads get passed down to the l-set and job will fail with
maximum number of bisections or minimum load step has been reach. Avoidance: If the fatal message is obtained, a small dummy mechanical load will have to be applied.
Known Error CR 2588
Known Error CR 2588 Corrected Version GL
Abstract Elements - CBAR,CBEAM - Poor Answers
Description
If the orientation vector for a CBAR or CBEAM element is defined nearly parallel with the elements axis, UFM 2026 may fail to appear. The resulting element coordinate system may be randomly defined, which may result in poor
answers depending on the section properties of the element. Avoidance: The user should ensure that the orientation vectors are at an angle of at least one degree from the element axis so as not to introduce
numerical difficulties in the problem. In Version 66 this error message has been changed to UWM 5464 or 5487 which will be issued whenever the orientation
angle is less than one degree. In Version 66 if the orientation angle is exactly zero, then the job will eventually fail. Some machines may issue SFM 4276 EC 7777 in the output, however, other may
Known Error CR 2609
Product MSC / MD Nastran Corrected Version 69
Abstract Plotting - PLTVEC,SEUPPLOT - PACKUNPK FM 211
Description
The SEUPPLOT feature may not be reliable for large models and multi-level superelement decks. Observed
problems include: PACKUNPK FATAL MESSAGE 211 in the PLTVEC module, missing
plot output, and incorrect deformed plots. In most cases the aforementioned
fatal message will occur as the result of an improper restart. The problem is not yet fully understood and users are request to forward problem data decks to MSC.
Avoidance: The user may be able to avoid difficulties by plotting one superelement
at a time using SEPLOT.
The scale information output by the PLOT module may be useful in obtaining plots of individual superelements that are to a compatible scale.
Known Error CR 2612
Product MSC / MD Nastran Corrected Version 70
Abstract Documentation - Application Manual,S - UWM 4591
command
format. The OUTPUT parameter shown in field four is not a legal parameter. Use of this parameter on the SURFACE command will result in UWM 4591, ILLEGAL
PARAMETER SPECIFICATION ON A SURFACE OR VOLUME CARD. This documentaion
has been superseded by the Quick Reference Guide. The SURFACE command as
well as all other plot commands are now documented in the QRG.
Avoidance: Remove the OUTPUT parameter from the SURFACE command format
description in the Application Manual. Known Error CR 2623
Product MSC / MD Nastran Corrected Version 70
Abstract Documentation - A.M. 2.4 - Generalized Dynamic Reduction
Description
Section 2.4 of the Application Manual documents the algorithm used in the DYCNTR Module to determine the
DYNRED parameters when the auto select feature is used. This documentation
incorrectly states that the solution for the equations in brackets are rounded up to the next integer value when in actuality they are truncated to the next lowest integer value. Furthermore, the documentation does not list two of the criteria used in the algorithm. The first is that the LCSET cannot be greater than the number of non null mass columns and the second is that the LCSET will be adjusted up such that Nr, the number of initial random vectors calculated within the module, will
divide evenly into LCSET.
Avoidance: The differences should be noted in the A.M. Known Error CR 2627
Product MSC / MD Nastran Corrected Version 67.5
Abstract Material Nonlinearity - NLITER - Excessive Wall Clock Time
Description
When running SOL 66 on Version 64 for the IBM VM/CMS, excessive elapsed time
may be encountered. The ratio of elapsed time to CPU time may be as great as 50:1 (IBM VM/CMS V64 and V65C only)
Avoidance: The problem is the result of the overhead involved
with link switching. This error is considered corrected by offering a single link version of the IBM VM/CMS system in Version 67.5. A possible
Known Error CR 2627
avoidance is to try to decrease DMAP looping by selecting appropriate parameters on the NLPARM card. For example, avoid using ITER or LSQN with KSTEP=1. In other words, make the problem converge as fast as possible by minimizing stiffness updates.
Known Error CR 2641
Product MSC / MD Nastran Corrected Version GL
Abstract Material Nonlinearity - NLITER, MPYAD - SFM 3001, SFM 3007, UFM 5423
Description
CLOAD entries must be used to apply load to upstream superelements in SOL
66. If loads are applied upstream and CLOAD entries are not used, SFM 3001 and SFM 3007 will be output from the NLITER module.
Avoidance: Input the required CLOAD Case Control and Bulk Data entries to avoid this error. See Application note dated June 1990 for proper application
of CLOAD input. Known Error CR 2643
Product MSC / MD Nastran Corrected Version 66
Abstract Documentation - RBE3 - SFM 2038
Description
Internally, the [Rm] matrix formed by the RBE3 element is always of the order of six by six. Thus, if less
than six degrees of freedom are specified for the independent degrees of freedom, the [Rm] matrix may be singular
causing the run to fail with SFM 2038 SINGULAR MATRIX FOR ELEMENT being
output.
Avoidance: It is required that six independent degrees of freedom always be specified. An Application Note
on the proper selection of the independent degrees of freedom, published in June of 1985, should be referred to.
SOL 60 should be used to test the numerical stability of MPC's and rigid elements.
Known Error CR 2648
Product MSC / MD Nastran Corrected Version 68
Abstract Documentation - HBT, TRIARG,TRAPRG - Flux Output Coordinate System