MD Nastran/MSC.Nastran Current Error ListCurrent Update: Jan 14,误列 2011-This file containsa. All General Limitationsb. All errors that have not been corrected in a released version.If the Version = GL then this indicates a General Limitation which indicates a fix is not planned.Continuous updates to the error list are available to MD Nastran / MSC Nastran clients on the MSC SimCompanion web page/infocenter/index?page=content&id=KI8008006The MSC Support pages can also be used to search for keywords to easily locate individual errors - Known ErrorCR 890Product MSC / MD NastranCorrected Version GLAbstract Grid Point Force - GPFDR - UFM 3008Description The open core requirement for the GPFDR module can be as large as (6X BUFFSIZE + 14 X number of grids) if the grids use a nonrectangular displacementcoordinate system. For problems in basic coordinates, the grid requirementdrops to 8 X number of grids.Known ErrorCR 1103Product MSC / MD NastranCorrected Version GLAbstract Dynamic Response - TRD, TRD1, FRRD, FRR - UFM 3005Description If the MGIV method of real eigenvalue extraction computes modes formassless DOF with uncoupled stiffnessterms, the eigenvalue is large (1.E+35) as it should be, but the generalizedstiffness is 0.0 (it should also be1.E+35). Null eigenvectors may be produced.An avoidance is to use PARAM,HFREQ or PARAM,LMODES to discard thesebad modes in dynamics.Known ErrorCR 1758Product MSC / MD NastranCorrected Version GLAbstract Cyclic Symmetry - Restarts - VariousDescription In superelement static cyclic symmetry (SOL 81), some restart pathsdo not function well. The followingrestart paths have been demonstrated to work, using the indicated inputand DMAP Alters. Other types ofrestarts can be made, using these techniques.A. Conventional Superelement Restarts.Use the same techniques applicable to noncyclic symmetry superelementanalysis.1. Exit during Phase I.2. Structural Changes in a Superelement.3. Load Change RestartB. Time Limit in a Harmonic LoopSET N = 0, residual onlySEMG = NPARAM,RESDUAL,-1 (bulk data)Input all bulk data, or use PARAM,NODATA,-1 and delete all the bulkdata except PARAM entries.C. Loads Change in One Tip Superelement, Same Number of Loading Conditions,SamKnown ErrorCR 1956Product MSC / MD NastranCorrected Version GLAbstract Differential Stiffness and Buckling - QRG, GAP Element - SFM 4202Description The GAP element has no differential stiffness and produces SFM 4202 whenused in conjunction with Solution 64 or SOL 4.Known ErrorCR 2004Product MSC / MD NastranCorrected Version GLAbstract Cyclic Symmetry - GPFDR - CPU LoopDescription Using SUBCOM/SUBSEQ commands in Cyclic Symmetry will result in a CPUloop in the GPFDR module. Cyclic Symmetry does not support the use of SUBCOM/SUBSEQcommands in the case control.An avoidance is to replace the SUBCOM with an appropriate SUBCASE andcombine loads by using the LOAD BulkData card.Known ErrorCR 2038Product MSC / MD NastranCorrected Version GLAbstract Elements - Composite Transverse Shear Modulus LimitationsDescription The transverse shear flexibility terms for composite plate elements calculatedfrom the PCOMP and MAT8 entries assume that primary bending occurs in theoverall material coordinate system defined by the angle on the CQUAD4 (CTRIA3,etc.) entries. Transverse shear flexibility and stresses may have pooraccuracy if transverse shear bending loads are not in the direction of thematerial X and Y axes, or if significant twist loads are present.This is a general limitation in all general purpose finite element programsdue to the plate having insufficient degrees of freedom to account completelyfor stresses caused by both transverse shear bending loads and twist loads.This is documented in other words in the MSC/NASTRAN V68 Reference Manual,Chapter 6 - Material Properties, Section 6.5 -Known ErrorCR 2090Product MSC / MD NastranCorrected Version GLAbstract Dynamic Response - DDR2 - GINO FATAL ERROR 3012, UFM 5423Description When the modal acceleration data recovery method is used in SOL 31 or SOL72 and a SUPORT entry is present, SFE 3012 may result in the DDR2 module.Since in most conditions the SUPORT entry must be present in a modal transientresponse with rigid body modes, the mode acceleration method may not beused on a structure having rigid body modes.There is no known avoidance.Known ErrorCR 2113Product MSC / MD NastranCorrected Version GLAbstract MSGMESH, MSGSTRESS, MSGVIEW - MAREA - Fatal ErrorDescription When the MAREA entry is used to equivalence parallel generator lines toa single active line, MSGMESH mayincorrectly equivalence end points of the parallel generator lines. An avoidance is to use MLINE entries after the offending MAREA entries toequivalence end points of the generator line to single active points.Known ErrorCR 2206Product MSC / MD NastranCorrected Version GLAbstract Response Spectra - SDR2 - Missing OutputDescription A request for acceleration or velocity output at a given set of pointsin a response spectra run will not behonored unless a displacement request for the same set of points is alsopresent.An avoidance is to include a displacement request for the same setof points where accelerations or velocitiesare requested. For example:SET 28 = 1,7,9,12,56,83DISP(PLOT) = 28ACCEL = 28VELO = 28Known ErrorCR 2251Product MSC / MD NastranCorrected Version GLAbstract Aeroelastic Analysis - SOLs 75 and 76 - RestartsDescription To perform efficient restarts with aeroelastic solution sequences,one may be required to possess knowledge of the manner in which the DMAPhandles the looping over the Mach number and reduced frequency pairs. ThisDMAP knowledge is only required when a run is terminated during the aerodynamicmatrix generation loop. A typical termination may be caused by exceedingthe allowed CPU time. Another case may occur when the user wishes to switchfrom SOL 75 and restart in SOL 76, but has not included the entry PARAM,GUSTAERO,-1in the SOL 75 run. The DMAP loop which includes the AMG and AMP moduleswas written expressly to perform efficient restarts for generation of theaerodynamic matrices. However, this efficiency comes with an associatedcost. The decomposition factors of the aeKnown ErrorCR 2322Product MSC / MD NastranCorrected Version GLAbstract Documentation - MSGMESH Analysts Gu - Incorrect DocumentationDescription On page 3-3 in the MSGVIEW portion of the MSGMESH Analysts Guide, it statesthat MSGVIEW plot sets areprinted in the the MSGMESH output. This print option was removed priorto the release of MSC/NASTRAN Version 64.Known ErrorCR 2341Product MSC / MD NastranCorrected Version GLAbstract Geometric Nonlinearity (SOL 64 - Follower Forces, SPC - Wrong AnswersDescription In SOL 64, follower forces are computed using the load requests ofthe present iteration and the geometry of the previous iteration. However,the geometric effects on follower forces, implied by a SPCD request, isnot reflected until the next iteration.There is no known avoidance.Known ErrorCR 2378Product MSC / MD NastranCorrected Version GLAbstract Eigenvalue Analysis - Lanczos - Unexplainable User MessageDescription If the Lanczos method is used for an eigenvalue analysis, the followingtermination message may be issued inthe eigenvalue analysis summary: NOT ALL EIGENVALUES FOUND IN RANGE. Thismessage is given when three consecutive shifts have failed to produce anynew eigenvalues. (V65 only)Avoidance: There is no known avoidance. The user should try rerunningthe problem with a different frequency range in order to force the shiftalgorithm to select a different series of shift values. Please refer toError 2571 for a related error.Known ErrorCR 2471Product MSC / MD NastranCorrected Version GLAbstract Frequency Response and Random - RANDOM - Wrong AnswersDescription Error 2423 and General Limitation 1602 instruct the user to duplicate requestsfor random analysis of the solution set in SOL 71, once as a solution setrequest, 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 followingprocedure: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 shouldnot be included within the same run.2. The XYPLOT requests for random output should be for the phKnown ErrorCR 2583Product MSC / MD NastranCorrected Version GLAbstract Material Nonlinearity - NLITER - UWM 5409, UFM 4553, 4542Description If in material nonlinear analysis the structure is not subjected to anymechanical loads but is subjected to thermal loads, UFM 4542: NO LOAD INCREMENTEXISTS FOR NONLINEAR SUBCASE may be output. This is a limitation of thedesign and will happen whenever the temperature loads cause no loads tobe passed down to the l-set. For example, a symmetric flat plate supportedon all sides or a simple beam supported on both ends subjected to only thermalloads will produce the fatal message. A possible alternative to UFM 4542 is some noise loads get passed down tothe l-set and job will fail withmaximum number of bisections or minimum load step has been reach.Avoidance: If the fatal message is obtained, a small dummy mechanicalload will have to be applied.Known ErrorCR 2588Product MSC / MD NastranCorrected Version GLAbstract Elements - CBAR,CBEAM - Poor AnswersDescription If the orientation vector for a CBAR or CBEAM element is defined nearlyparallel with the elements axis, UFM 2026 may fail to appear. The resultingelement coordinate system may be randomly defined, which may result in pooranswers depending on the section properties of the element. Avoidance: The user should ensure that the orientation vectors areat an angle of at least one degree from the element axis so as not to introducenumerical difficulties in the problem. In Version 66 this error messagehas 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 ErrorCR 2641 Product MSC / MD Nastran Corrected Version GL Abstract Material Nonlinearity - NLITER, MPYAD - SFM 3001, SFM 3007, UFM 5423Description CLOAD entries must be used to apply load to upstream superelements in SOL66. If loads are applied upstream and CLOAD entries are not used, SFM 3001and SFM 3007 will be output from the NLITER module. Avoidance: Input the required CLOAD Case Control and Bulk Data entriesto avoid this error. See Application note dated June 1990 for proper applicationof CLOAD input.Known ErrorCR 2664Product MSC / MD NastranCorrected Version GLAbstract Documentation - MSGMESH, EDGER - MSGMESH ERROR 9358Description On page 14-31 of the MSGMESH manual, Remark 3 under the EDGER entry statesthat: Thirty triplets of entries Di, Gi and Gi+1 may be entered on a singlelogical EDGER card. In fact, if more than 16 triplets are specified ona single logical EDGER entry MSGMESH ERROR 9358 will result.Known ErrorCR 2698Product MSC / MD NastranCorrected Version GLAbstract Miscellaneous - PREFACE - O/S ErrorDescription The scratch files, NSTNxx, on the IBM MVS-SP and IBM MVS/XA systems cannotbe allocated using the block option on the space parameter. If the blockoption is used as a space request for these files, the following messagemay appear in the JES-LOG: AB002I STOP NO SCRATCH UNITS ASSIGNED(NSTNXX).(IBM MVS and IBM MVS/XA only)Avoidance: The avoidance is to specify space requests using cylinders ortracks. The delivered MSC/NASTRAN Procedure allocates the NSTNxx fileswith cylinders, therefore, if the user wishes to change these requests,he must use tracks. This limitation applies to temporary files only. Hence,permanent files, such as the DB01 and NPTP, can be allocated using the blockoption.Known ErrorCR 2772Product MSC / MD NastranCorrected Version GLAbstract Geometric Nonlinearity - - Poor AnswersDescription Analysis of structures including the effects of prestress (differentialstiffness) assumes that the loads remain constant in direction. If SOL64 or 66 is used to form a stiffness matrix, and the matrix is used in anothersolution sequence (like 63 or 69) , and there are follower force effects(like thermal or pressure loads), then some terms are missing in the equations.The effects are sometimes small, and can be neglected. An error will showup as an effective rotation spring for free body motions.Avoidance: The differential stiffness approximation used in MSC/NASTRANdoes not account for follower force effects such as thermal loads. Thus,there is no known avoidance.Known ErrorCR 2805Product MSC / MD NastranCorrected Version GLAbstract Eigenvalue Analysis - CEAD - Poor AnswersDescription For numerically difficult complex eigenvalue problems, such as those thathave large gaps between eigenvalues, the accuracy of the Hessenberg Methodof complex eigenvalue extraction is sensitive to the number of bits utilizedby the machine to represent a numbers mantissa. The fewer bits used, themore likely significant error will occur.Avoidance: Difficult problems as described above should be broken up intosmaller search regions.Known ErrorCR 2822Product MSC / MD NastranCorrected Version GLAbstract DBC/TRANS/ACCESS - DBC - Missing OutputDescription Although PARAM,POST,0 is supported in most solution sequences in Version66, the MSC/GRASP or MSC/XL databases thus created may not be correct. Data blocks may be missing, the headers may be nonstandard, or the contentof the data blocks may be incorrectly formatted. This affects all programswhich later access these databases, including MSC/GRASP, MSC/XL and userwritten programs. The solution types that are affected are Complex Eigenvalues,Heat Transfer, Aeroelastic Analysis, Cyclic Symmetry, Buckling and DesignOptimization. The specific solution sequence are affected are:67,70,74,75,76,81,82,83,88,89,105,107,110,114,115,118,144,145,146,153,159,200This error can sometimes be recognized by the issuance of * SYSTEM WARNINGMESSAGE 6065 (DBC), * DBCMSG ERRORKnown ErrorCR 2925Product MSC / MD NastranCorrected Version GLAbstract Miscellaneous - XSORT - SFM 3008, Insufficient Core AvailableDescription The bulk data sort module requires that all continuation entries fitin real memory. If they do not, the XSORT module will fail with SFM 3008Insufficient Core Available for Subroutine XSOPIV.Avoidance: Having deck in sorted order and increasing core are theonly known avoidances.Known ErrorCR 2934Product MSC / MD NastranCorrected Version GLAbstract Optimization/Design Sensitivity - ELTPRT - Wrong AnswersDescription The contribution of concentrated mass elements and non-structural mass tothe weight and volume of the design model is not accounted for in SOL 200.Both the weight and volume responses will be incorrect if these elementsare present. This error also effects the design sensitivity calculationin SOLs 51, 53 and 55.Avoidance: No known avoidance exists.Known ErrorCR 3035Product MSC / MD NastranCorrected Version GLAbstract Eigenvalue Analysis - REIGL - SFM 5299Description Models with two or more widely separated groups of repeated roots may failwith SFM 5299: UNRECOVERABLETERMINATION FROM LANCZOS ITERATION, INTERNAL ERROR CODE -3, USER RETURNCODE -33. This error was encountered for a model with two groups of rootsseparated by 1.E+8 rad/sec, each group contained eight identical roots.Avoidance: Either use the SINV method or search the separate regions indifferent runs.Known ErrorCR 3039Product MSC / MD NastranCorrected Version GLAbstract Documentation - MSC/NASTRAN Primer, - Coordinate SystemsDescription MSC/NASTRAN Primer, Harry Schaefer, 2nd Ed., Section .1 items 1 and4 for the local coordinate system of QUAD4 are wrong. As shown by Fig 9-13b,the cited statements should read:1. Having a unique orientation within multiples of 90 degrees, independent of the starting grid point number.4. Having the x-axis nearly parallel to the G1-G2 edgein the general case.Also, in the MSC/NASTRAN Primer in Section defaults for PSHELLZ1,Z2 should read Z1 = -Z2 = T/2.Known ErrorCR 3108Product MSC / MD NastranCorrected Version GLAbstract Documentation - MSC/NASTRAN PRIMER - DocumentationDescription Equations 9.63 and 9.66 in the MSC/NASTRAN PRIMER contain typographicalerrors. Equation 9.63 should state (e - zk) not (e + zk). Equation 9.66should state (2/3)(t*3) not (tc*2) and should state (1/2)(tc*2) not (1/3)(t*3).Known ErrorCR 3273Product MSC / MD NastranCorrected Version GLAbstract Documentation - Verification Problem