Added Error Correction to all systems on the MSC.Nastran 2001(R2) CD 30496 2001.0.3 Restarts - Delete Entry - Various User Fatal Messages When a restart delete entry, using the small field format, is incorrectly shifted a column to the left, the beginning and end values are misread without a fatal message. For instance the following delete bulk data entry: / 65266 65267 is read as: / 5266 5267 Avoidance: Use free field, comma separated input for this entry. 38769 2001.0.3 Materials - CQUAD4, MAT8, G12 - UFM 4297 In Version 70.7, if the G12 field on the MAT8 entry is blank, then the job will fail with the following misleading error messages: *** USER FATAL MESSAGE 4297 (EQD4D) QUAD4 ELEMENT WITH ID = 1 HAS AN INTERIOR ANGLE POSSIBLY GREATER THAN OR EQUAL 180 DEGREES. Avoidance: There are two possible avoidances: 1. Add the G12 field to the MAT8 entry if appropriate. or 2. Set SYSTEM(173)=2 40165 2001.0.3 Nonlinear Transient Analysis - NLRGAP, PARAM,TSTATIC, NLTRD2, UWM 5258, SWM 3002 An NLRGAP entry exists in a nonlinear transient analysis with param,tstatic,1 then the job will fail in the nltrd2 module with UWM 5258 and SWM 3002. Avoidance: Other than removing the NLRGAP entry there is no avoidance. 41302 2001.0.3 Aeroelastic Analysis - CAERO - Wrong Answers An error exists in the recovery of nodal aero mesh data (like OPPHIPA in Sol 145) if the CAERO ID's do not allow enough spacing for unique mesh point node id's (element IDS must be unique, but node ids are allowed to be non-unique for backward compatibility). In the case of non-unique nodes, the aero mesh data should NOT be recovered. Instead, it is recovered but the results are nonsensical. DBC may give warnings or fatal messages. For solid p-element dynamics in SOL 112 (modal transient), the principal strains calculated with DDRMM are incorrect. Avoidance: A workaround is to turn DDRMM off by setting param,ddrmm,-1. 1-11YIK 2001.0.3 Optimization/Design Sensitivity - PBARL, PBEAML, DVPREL2 - Wrong Answers An optimzation task may produce wrong design sensitivity coefficients when it meets the following conditions: 1) pbarl or pbeam properties are designed; 2) a DVxREL2 entry is presented. Avoidance: use PBAR/PEAM to replace PBARL/PBEAML. 1-1R8S9 2001.0.3 Cyclic Symmetric Buckling - STATSUB - UFM 1126 in CYCLIC3 When running pre-stiffened modes in cyclic symmetry SOL 115 or buckling with SOL 116, using STATSUB, if scr=no is used, UFM 1126 in CYCLIC3 is issued. Avoidance: Either run with scr=yes or use the following alter for both SOL 115 and SOL 116. COMPILE CYCBUCKL ALTER 'CYCLIC3'(,-1) DELETE /KKK,,,, $ COMPILE CYCMODE ALTER 'CYCLIC3'(,-1) DELETE /KKK,,,, $ ENDALTER 1-2706201 2001.0.3 Optimization/Design Sensitivity - DMIG - Adjoint Method Produces Wrong Answers If any of the mass damping or stiffness matrices are not symmetric, results obtained using the adjoint sensitivity analysis will be in error. Asymmetry is typically introduced via user input matrices that are not asymmetric. Acoustic matrices generated in MSC.Nastran are handled correctly and do not have this error. Avoidance: Setting PARAM AUTOADJ NO forces the direct senisitivity analysis and avoids the error. A dmap alter in the attachment corrects the error while using the adjoint method. Fix taken in r30 1-2754601 2001.0.3 Aeroelastic Analysis - Mach label in Aerodynamic Force Output is Incorrect The AEROF request in SOL 146 produces a table which always indicates MACH=0.00000, regardless of the Mach number used in the analysis. If there is a single Mach number input with the MKAEROi entries, then only the label is wrong. With multiple Mach numbers, the print will be based on the lowest Mach number and the data will be in error if the analysis has been performed at other than the lowest Mach number. Avoidance: The following dmap alter produces the correct Mach number print: compile seaero alt 1-2804804 2001.0.3 Elements - QUAD4, TEMP(LOAD) - Wrong Answers The new skewed QUAD4 element formulation introduced in Version 70.7 may yield incorrect answers for static analyses with thermal loads. Avoidance: The version 70.5 formulation may be requested by setting SYSTEM(173)=2. 1-2999801 2001.0.3 Parallel Methods - DOMAINSOLVER ACMS - SE Commands Cause Failure In ACMS case control superelement commands such as SEALL=set will cause ACMS to fail. Avoidance: Comment out all superelement case control commands in runs using DOMAINSOLVER ACMS. Note that SEQP removes SUPER records from case control. Fatal messages takes the form: *** SYSTEM FATAL MESSAGE 4252 (SEMA) MATRIX XAAV FOR UPSTREAM SUPERELEMENT XX DOES NOT EXIST. where XX is some upstream SE number. 1-3011601 2001.0.3 Nonlinear Transient Analysis - LOADSET - Wrong Answers When a static load set is specified in SOL 129 in version 2001, incorrect result may be produced if: (1) The LOADSET case control command and LSEQ bulk data entries are omitted (an enhancement supported by v2001); and (2) At least one of the following static loads is referenced by the field of DAREA in TLOADi (i=1,2) bulk data card. They are FORCE1, FORCE2, MOMENT1, MOMENT2, PLOAD, PLOAD4 and PLOADX1. Avoidance: Always use the LOADSET case control command and the LSEQ bulk data entries to specify static loads in nonlinear transient analysis (SOL 129) if the type of static loads is a follower force. 1-3068612 2001.0.3 Aeroelastic Analysis - AMP - SFM LAJJT Matrix Not Available If multiple aero methods such as strip theory and the doublet lattice method are used in the same run, the AMP module will produce a message that the LAJJT matrix is not available. Avoidance: Do not run multiple aero methods in the same run or run in a Version 70 or earlier system. 1-3103909 2001.0.3 Optimization/Design Sensitivity - DRESP1 - SFM 3003 The above fatal message can occur when spc forces or element strain energy responses are used in conjunction with grid responses. The problem is caused because the code incorrectly thinks that adjoint sensitivity method is appropriate and subsequent calculations produce incompatible datablocks. Avoidance: Set PARAM AUTOADJ NO to preclude the selection of adjoint senstivity analysis. 1-3151101 2001.0.3 Optimization/Design Sensitivity - Adjoint Method with Inertia Relief yields Wrong Answers Sensitivity analysis results are in error for a statics analysis with inertia relief when the program selects the adjoint method for the sensitivity analysis. Avoidance: Set PARAM,AUTOADJ,NO to force the direct sensitivity method. 1-3151106 2001.0.3 Optimization/Design Sensitivity - Gravity effects ignored in adjoint method if PARAM,CDIF,YES The adjoint senstivity calculation ignores the sensitivity of any gravity loads when the PARAM,CDIF.YES is used to specify central difference based element perturbations. Avoidance: Set PARAM,CDIF,NO (the default for property optimization) or obtain a DMAP alter from client support. 1-3162504 2001.0.3 Optimization/Design Sensitivity - APRCOD=3 - Inaccurate Gradients APRCOD=3 in design optimization approximates the constraint values using the the most conservative prediction on the change in the constraint due to a change in a design variable. The constraints calculated in this fashion are computed correctly, but the gradient of these constraints can be computed incorrectly. Avoidance: Use another APRCOD value (1 or 2). Internal testing has not revealed a case where the incorrect computation has produced a difference in the final design. 1-3172901 2001.0.2 Aeroelastic Analysis - MRGMON - Monitor Points Ignored In aeroelastic analysis, when only one user-defined structural monitor point is defined, it may be incorrectly ignored during the MRGMON function 1-3451401 2001.0.3 Nonlinear Analysis - GPFORCE - Missing Output In a SOL 106 run, if grid point force is requested, and the model contains more than one linear element type and thermal loadings are applied, then the following fatal message will be issued. *** SYSTEM FATAL MESSAGE 3007 (GPFDR) ILLEGAL INPUT TO SUBROUTINE GPFTDL Avoidance: Other than having only one linear element type, there is no known avoidance. 1-3496527 2001.0.3 Modal Frequency Response - ESE - Incorrect Output In a modal frequency response analysis, if element strain energy is requested and a set ID of 2 is used, then erroneous complex acoustic results may be printed, even though there is no acoustic elements in the model. Avoidance: Use a set ID other than 2. 1-3654801 2001.0.3 Nonlinear Analysis - SFM 4276, EC 7777 in IFS10P Solution 106, nonlinear analysis, jobs may fail on Compaq Alpha systems in routine IFS10P with the message: BIOMSG: ERROR 7777 HAS OCCURRED IN ROUTINE tbk 1-3677801 2001.0.3 Elements - CWELD - Wrong Answers The calculation algorthm for spot weld elements (CWELD) sometimes returns a projection point outside of the triangular shell. The program should return an error and abort the execution. This leads to wrong answers. 1-3677804 2001.0.3 Elements - CWELD - Performance MSC.Nastran CWELD elements perform unnecessary operations that waste cpu resources. The program shouldn't generate shell normals for the point-to-point or point-to-patch connection of spot welds with the BEAR option. Furthermore, the program shouldn't check if the projection points are shell grids. Yes, this is just a performance issue. The purpose of this quality is to support the connection of spot weld to an attached mass. 1-3683607 2001.0.3 Loads - Extended output force resultants, Wrong Answers with Output COORDi Systems Moment summations for forces could be in error if output coordinate systems are used at grid points. The error affects only the moment summations due to forces in the extended (7-line output) summation option. The TOTALS line is always correct. Avoidance: Ignore the moment summation portion of the force output. 1-3699001 2001.0.3 Acoustic Analysis - XYTRAN gets into infinite loop Large acoustic analysis sol 111 jobs may get into an infinite loop in the XYTRAN module. This behavior has been seen on both NEC SX-5 and AIX systems. 1-3724703 2001.0.3 Optimization/Design Sensitivity - SDSAC - UFM 5608 When a superelement optimization task includes a DRESP2/3 entry that references a DRESP1 entry and also references a design entry following DRESP1 (e.g., DViRELj, DRESP2, USRDATA), it will fail with the following error message: USER FATAL MESSAGE 5608 () DRESP2 ENTRY ID= 100 REFERENCES AN UNDEFINED DRESP1 ENTRY ID= 1 Avoidance: No practical avoidance exist. Do not include the offending entries or do not use superelements. 1-3770604 2001.0.3 Frequency Response - MEFFMASS - Wrong Answers If modal effective mass output (MEFFMASS) is requested in a frequency response analysis that requests more that 50 modes, than the formatting of the "MODAL EFFECTIVE MASS FRACTION" table will deteriorate and put each additional mode on a new page. Also models with many roots (more than 100) may result in meaningless results being printed to this table. This error has been fixed in Nastran 2001.0.3 except on Cray platforms. 1-3787901 2001.0.3 Acoustic Analysis - Fluid/Structure Analysis with multiple PANEL bulk data entries - UFM 653 Fluid/Structure analysis using multiple PANEL bulk data entries may fail with a GINO read error. The GP5 module counts EDT PANEL entries incorrectly when there are 3 or more individual PANEL bulk data entries. Avoidance: Use a single PANEL entry to list panel data. 1-3788001 2001.0.3 P-elements - CORDi - UFM 2025 (VECPLOT) Large p-element models with output displacement coordinate systems may fail in VECPLOT with the following message: error in VECPLOT: *** USER FATAL MESSAGE 2025 (VECPLOT) UNDEFINED COORDINATE SYSTEM ID = 10 Avoidance: A workaround is to increase BUFFSIZE. 1-3889242 2001.0.3 Case Control - WEIGHTCHECK. CGI=NO - Extra Output If on the WEIGHTCHECK case control command set is not equal to g, then the CG location, I(S), I(Q), and Q matrices are not printed unless the CGI keyword is set to YES. This is the design intent. The default for CGI is NO. However, if CGI is explicitly set to NO for set not equal to G, then the CG location, I(S), I(Q), and Q will also be printed. For example: weightcheck(set=(n),cgi=no )=yes Avoidance: If this additional information is not desired, leave the CGI keyword out. 1-3961311 2001.0.3 Automatic Component Mode Synthesis - RESIDUAL VECTOR, USET,U6 - UFM 2049 If a job employs ACMS, and USET,U6 is used to request a residual vector, then the job will fail with the following error messages: *** USER FATAL MESSAGE 2049 (GP4) UNDEFINED GRID POINT xx HAS A COORDINATE REFERENCED ON A USET CARD. Avoidance: Use the inertial load method or the applied load method (LOADSET/LSEQ combination) This is now fixed in 2002 and 2001t1 via change to seqext.F. Grids in U6 set are forced to the residual. 1-4051301 2001.0.3 Elements - CWELD - Incorrect sign of moments in plane 2. The moments in plane 2 (m_y) of CWELD elements are output with the opposite sign. 1-4056201 2001.0.3 Elements - CWELD, PWELD - UFM 2042 (EMG) If the CWELD element is used in superelement analysis the job may fail with the message: *** USER FATAL MESSAGE 2042 (EMG) MISSING MATERIAL TABLE xxx FOR ELEMENT yyy Avoidance: There is no avoidance. 1-4067301 2001.0.3 Miscellaneous - ISHELL module prematurely terminates Nastran The ISHELL module terminates the Nastran execution if any forked process takes more than about 5 minutes to complete. 1-4070108 2001.0.3 Optimization - PBARLs, PBEAMLs - UFM 6499 In an optimization run, if both PBARL and PBEAML exist in the model, then the job may fail with the following error messages: THE GRADIENT OF CONSTRAINT NUMBER x IS ZERO CONSTRAINT IS REMOVED FROM THE ACTIVE SET ** THIS IS A VIOLATED CONSTRAINT ** A FATAL ERROR WILL BE GENERATED **** ONE OR MORE VIOLATED CONSTRAINTS HAS A ZERO GRADIENT **** NO PROGRESS IS POSSIBLE OPTIMIZATION TERMINATED *** USER FATAL MESSAGE 6499 (DOM9D) Avoidance: Use either all PBARL or all PBEAML or convert them to equivalent PBAR and PBEAM 1-4126807 2001.0.3 Part Superelements - BEGIN SUPER, CORD - Possible Wrong Answers For a PART superelement, if the boundary point of a superelement uses a secondary displacement coordinate system, then the results may be incorrect. Avoidance: Use the assembly basic coordinate system at the boundary. 1-4306901 2001.0.3 Elements - CBEND, PLOAD1 - SFM 3007 (SDRX), ILLEGAL INPUT TO SUBROUTINE SDRX3 MSC.Nastran 2001 may issue SYSTEM FATAL MESSAGE 3007(SDRX) - ILLEGAL INPUT TO SUBROUTINE SDRX3 for a model with CBEND elements requesting STRESS=ALL. Avoidance: If this error occurs, use a SET which does not include the BEND elements. 1-4371807 2001.0.3 Superelements - EXTSEOUT, GPSP - UFM 5290 A SOL 103 superelement assembly run employing an external superelement created in an earlier run by using the EXTSEOUT Case Control command fails with UFM 5290 in the GPSP module if one or more A-set points of the external superelement are not on the boundary. 1-4470101 2001.0.3 Miscellaneous - OUTPUTT4 - UWM 6445, NanQ in output OUTPUT4 ASCII format closes off a matrix with an extra column. An arbitrary number is placed in this column, which is later thrown away. On NT and Compaq DEC Alpha systems this number may be an illegal number which prints as NaNQ when viewed with an editor. This may also cause the INPUTT4 module to crash with *** USER WARNING MESSAGE 6445 (INPTT4) A FORTRAN FORMATTED READ ERROR HAS OCCURRED WHILE PROCESSING UNIT = 12 USER INFORMATION: THE FILE WAS SPECIFIED IN AN ASSIGN FILE MANAGEMENT STATEMENT 1-4483401 2001.0.3 Effective Mass Table - Frequency Column has Wrong Frequencies When effective mass is calculated for more than 100 modes, the effective mass listing gives wrong frequencies in the table. 1-4590602 2001.0.3 Optimization - Incorrect PCOMP Punch output when SOUTI = BLANK or "NO" on PCOMP entry Solution 200 will generate incorrect punched PCOMP entries when the SOUTI field is blank or "NO". On the punched entries the SOUTi field is populated with "STRN" instead of "YES" or "NO". Reading this entry into Nastran will yield a fatal message. Also SOL200 generates designed PBEAM for both END A and B data for a constant section beam. For constant section beams only END A data for PBEAM and PBEAML should be output. Avoidance: The only avoidance is to edit the punch file. 1-4638015 2001.0.3 Beam Library - CHAN, CHAN1, CHAN2 - Wrong Property for Shear Center Location The beam library (PBEAML) calculates an incorrect shear center for the CHAN, CHAN1, and CHAN2 cross sections. Patran uses the Nastran routines and also calculates an incorrect shear center. Avoidance: There is no avoidance. 1-4702701 2001.0.3 Parallel Methods - SYSTEM(107) - Traceback in Unsymmetric Decomp Shared memory parallel executions (system(107)=n) will give a traceback on Cray set to other than 1. Avoidance: High ranks is not supported for parallel on this platform. The default for system(221) has been set back to 1 in 2001.0.3 to correct this error. 1-4835004 2001.0.3 Random Analysis - No results when using PSDF, ATOC, or RALL If random output is requested using the PSDF, RTOC, or RALL options in case control, no output will be produced unless there is a SORT2 output request or an XYPLOT request for random output. Avoidance: Although there is no printed output from these options, the output datablocks can be created by adding a single XYPLOT command which requests random output or requesting SORT2 output. 1-4885505 2001.0.3 Miscellaneous - WEIGHTCHECK, QSET - SFM 3007 (VECPLOT) If WEIGHTCHECK is requested for a model with superelements and the Q-set is defined using GRID points, the program will issue *** SYSTEM FATAL MESSAGE 3007 (VECPLOT) ILLEGAL INPUT TO SUBROUTINE PARTN Avoidance: Either remove the WEIGHTCHECK request or don't use GRID points for the Q-set degrees of freedom. 1-4922804 2001.0.3 Optimization/Design Sensitivity - PLOAD1, SDRX - UFM 2025 In solution 200, multiple PLOAD1 sets may result in USER FATAL MESSAGE 2025 in the SDRX module. 1-4936611 SSSALTER - checka - Modal Effective Weight is given around Origin Only When modal effective weight is calculated in checka, it will be calculated about the origin no matter what value you give for GRDPNT. Avoidance: Insert the following line after COMPILE KEEFW TYPE PARM,,I,Y,GRDPNT=0 1-4938101 2001.0.3 Optimization/Design Sensitivity - PBARL, PEAML - SFM 3007 (DOPR1) SYSTEM FATAL MESSAGE 3007 (DOPR1) ILLEGAL INPUT TO DOP1E may be issued if DVPREL1 entries point to designed PBARL's or PBEAML's while other DVPREL1 entries point to PBEAM's or PBEAML's. Avoidance: The only sure avoidance is to not design PBARL's or PBEAML's with PBEAM's or PBEAML's 1-4948003 2001.0.3 Optimization/Design Sensitivity - SUBCOM - ILLEGAL INPUT TO SUBROUTINE DSAD12 The fatal message below may occur when SUBCOM's are used in SOL 200 with a SUBSEQ request that references a single subcase. USER FATAL MESSAGE ILLEGAL INPUT TO SUBROUTINE DSAD12 Avoidance: Either eliminate the SUBCOM request or reference more than one subcase with the SUBSEQ. The Ri coefficients on the SUBSEQ can be 0.0 1-5009015 2001.0.3 Heat Transfer - VIEW - Large models may punch impropely formatted RADLST entries Improperly formatted RADLST entries may be output from the VIEW module in heat transfer analysis of large models. 1-5065701 2001.0.3 Automatic Component Mode Synthesis - Output scrambled in incorrect order Running ACMS in SOL 111 with multi-grid, multi-frequency, multi-subcase, and multi-output requests produces correct results but in the wrong order. That is, the data from one subcase is not contiguous in the OFP data blocks. 1-5079301 2001.0.3 Optimization/Design Sensitivities - Incorrect senstivities with the PBEAML The sensitivity of the N1(b) and N2(a) properties with respect to the PBEAML dimensions are reversed. This can result in errors in the element response sensitivities. To date, this error has only appeared to be significant with the HAT1 section type. Avoidance: If neutral axis locations are important, the only complete avoidance is to replace the PBEAML with a PBEAM and use DVPREL2 relations to specify the beam dimension/property relationships. 1-5088301 2001.0.3 Superelements - QSET, EXTSEOUT - SFM 3200 (BNDRYINFO) A SOL 103 external superelement creation run using the EXTSEOUT Case Control command with BULK=PUNCH option fails with SFM 3200 in the BDRYINFO module (caused by logic error 11 in subroutine BDYINP) if the number of Q-set SPOINTs specified is odd. Avoidance: Use an even number of Q-set points. 1-5104006 2001.0.3 Optimization/Design Sensitivity - PBARL, PBEAML - Divide by Zero For closed hat sections, the input constraints are chekced, but the less stringent of 'GT' is utilized. This may causes a divide by zero in the RJ computation. Avoidance: To avoid the floating point divide by zero, observe the following constraints on DIMx for HAT1 sections (closed hat) 1. DIM1>DIM3 2. DIM1>2*DIM4 3. DIM2>2*DIM4+DIM5 1-5104009 2001.0.4 Optimization/Design Sensitivity - PBEAML - Incorrect Sensitivities For tapered PBEAML, cw(b), na1(b) and/or na2(b) are perturbed when end a DIMx are designed. Although this is not correct, the impact on sensitivity is not expected to be significant. 1-5109902 2001.0.3 Automatic Component Mode Synthesis - ACMS - Poor Accuracy The accuracy of the dynamic response output (SOL 111 and 112) may be reduced due the the retention of an inadequate number of Q-set points in the residual structure. If the number of O-set modes, plus the number of associated residual vectors, is greater than [ngrids/(numdom*4)], the accuracy may suffer. Avoidance: Include the following bulk data entry: senqset,0,N where N is greater or equal to the required number of Qset points. 1-5126706 2001.0.3 Dynamic Analysis - SPCD, BNDSPC - UFM 6083 If the new Version 2001 dynamic enforced motion is used with multiple input locations, it is possible that the run might fail incorrectly with UFM 6083 in BNDSPC, indicating a long list of points which do not exist. Avoidance: This problem has only been seen on Windows/NT systems. If this problem is encountered it may be avoided by defining an ASET. 1-5129501 2001.0.3 Superelements - EXTSEOUT, CORD2x - UFM 315 (PREFACE) An external superelement creation run with a boundary grid point referencing a CORD2x displacement coordinate system and using the EXTSEOUT Case Control command with BULK=PUNCH option fails with UFM 315 in the Preface in a subsequent assembly run due to a missing asterisk (*) in the CORD2x name field. 1-5129505 2001.0.3 Superelements - EXTSEOUT, BULK=PUNCH - UFM 5290 (GPSP) A SOL 103 superelement assembly run employing an external superelement created in an earlier run by using the EXTSEOUT Case Control command and BULK=PUNCH fails with UFM 5290 in the GPSP module if one or more A-set points of the external superelement are not on the boundary. See also related Quality 1-4371807; the difference between these qualities is that this quality employs the BULK=PUNCH option. 1-5131904 2001.0.3 Optimization/Design Sensitivity - FSD does not support DRESP1=CSTRAIN Fully stressed design optimization runs do not fully support DRESP1=CSTRAIN. Avoidance: There is no avoidance. 1-5169004 2001.0.3 Superelements - EXTSEOUT, CORD2R, QSET - SFM 3200 (BDRINFO) A SOL 103 external superelement creation run with 9 boundary grid points, 120 Q-set SPOINTs and 15 CORD2R Bulk Data entries and using the EXTSEOUT Case Control command terminates with SFM 3200 in the BDRYINFO module with Logic Error 11 in subroutine BDYINF. 1-5178604 2001.0.3 Superelements - EXTSEOUT, CORD2x - UFM 2004 (GP1) If a boundary grid point in an external superelement creation run using the EXTSEOUT Case Control command uses a CORD2x system as a displacement cord. system and this CORD2x entry references another CORD2x entry that is not used by any other boundary point, then the subsequent assembly run terminates with UFM 2004 in the GP1 module. Avoidance: Make sure the CORD2x systems used by boundary points do not reference other CORD2x systems not used by any other boundary point. 1-5509401 2001.0.3 MSC.Nastran 2001.0.3 removes 2 gig XDB File Size Limit MSC.Nastran 2001.0.3 effectively removes the 2 gig XDB file size limit. The default value for buffsize of 1024 will allow a file size of approximately 68 gig but any one object is still limited to 1 gig. While the need for a file size greater than 68 gig is not likely, the need for an object greater than 1 gig is. Increasing the buffsize to 65535 with the following assign statement will allow a single object to be 68 gig. assign dbc='testb.xdb' status=new unit=40 recl=65535