Please help me with Nastran error..

SEONG

Hello~All

Help me…ㅠㅠ

I conducted the analysis using Nastran SOL103.

I am having trouble troubleshooting.

I have attached the relevant data.

Luca Cavagna

As far as I understand, you are defining an RBE reference point from nodes which have only solid elements (solid element do not have rotational stiffness associated). So you need to correct your RBE3 cards and use only 123 instead of 123456

Jason_Craanen

Hello

You should reach out to Nastran support regarding any Nastran solver error.

Thanks

Luca Cavagna

you should provide the .f06 file or part of it when FATAL occurs

SEONG

0S O R T E D B U L K D A T A E C H OENTRYCOUNT . 1 .. 2 .. 3 .. 4 .. 5 .. 6 .. 7 .. 8 .. 9 .. 10 .ENDDATA
TOTAL COUNT= 1753606
INPUT BULK DATA ENTRY COUNT = 1753611
1 MODAL JANUARY 25, 2025 MSC Nastran 12/18/18 PAGE 38976
MODE SHAPE0M O D E L S U M M A R Y BULK = 0
ENTRY NAME NUMBER OF ENTRIES
---------- -----------------
CHEXA 2811
CQUAD4 820839
CTRIA3 17390
EIGRL 1
GRID 868571
MAT1 6
PSHELL 5
PSOLID 1
RBE2 566
RBE3 20249

*** USER WARNING MESSAGE 285 (DML)
FATAL ERRORS WERE FOUND WHILE READING THIS BEGIN SECTION
MODEL SUMMARY DOES NOT INCLUDE COUNT OF FATAL ENTITIES
^^^^^^ >>> IFP OPERATIONS COMPLETE <<<
^^^*** USER INFORMATION MESSAGE 22964 (rmrgdrot_impl)
One or more RBE3 elements have been detected for which the dependent GRID connects to solid elements only but
dof 456 have been specified as part of REFC. In some cases, this may cause inefficient processing. Up to 50
pairs of RBE3 and REFG with this occurring are listed below.
User Action: If this is intentional, ignore this message, otherwise, you can set MDLPRM,RMRBE3RT,1 to
automatically remove dof 456 from the REFC on these RBE3s.
1855967 48743238
1855968 48743239
1855969 48743240
1855970 48743241
1855972 48743242
1855973 48743243
1855974 48743244
1855975 48743245
1855977 48743247
1855978 48743248
1855979 48743249
1855980 48743250
1855981 48743253
1855982 48743254
1855983 48743255
1855984 48743256
1855986 48743257
1855987 48743258
1855988 48743259
1855989 48743260
1855991 48743262
1855992 48743263
1855993 48743264
1855994 48743265
1855995 48743268
1855996 48743269
1855997 48743270
1855998 48743271
1856000 48743272
1856001 48743273
1856002 48743274
1 MODAL JANUARY 25, 2025 MSC Nastran 12/18/18 PAGE 38977
MODE SHAPE00

                1856003    48743275

                1856005    48743277

                1856006    48743278

                1856007    48743279

                1856008    48743280

                1856009    48743283

                1856010    48743284

                1856011    48743285

                1856012    48743286

                1858002    48743287

                1858003    48743288

                1858005    48743289

                1858036    48743290

                1858039    48743292

                1858041    48743293

                1859573    48743294

                1859574    48743295

                1859575    48743298

                1859576    48743299

^^^*** USER FATAL MESSAGE 9002 (SUBDMAP IFPS)
ERROR(S) ENCOUNTERED IN THE MAIN BULK DATA SECTION
SEE MESSAGES ABOVE. ERROR ENCOUNTERED IN MODULE IFP,
^^^1 MODAL JANUARY 25, 2025 MSC Nastran 12/18/18 PAGE 38978
MODE SHAPE00

*** USER INFORMATION MESSAGE 4425 (PRTPRN)
ONE OR MORE FATAL ERRORS HAVE OCCURRED. THERE MAY BE MORE ERROR MESSAGES IN THE PRECEDING OUTPUT
1 MODAL JANUARY 25, 2025 MSC Nastran 12/18/18 PAGE 38979
MODE SHAPE0

• D B D I C T P R I N T * * * * SUBDMAP = PRTSUM , DMAP STATEMENT NO. 71

0 * * * * A N A L Y S I S S U M M A R Y T A B L E * * * *
0 SEID PEID PROJ VERS APRCH SEMG SEMR SEKR SELG SELR MODES DYNRED SOLLIN PVALID SOLNL LOOPID DESIGN CYCLE SENSITIVITY

0SEID = SUPERELEMENT ID.
PEID = PRIMARY SUPERELEMENT ID OF IMAGE SUPERELEMENT.
PROJ = PROJECT ID NUMBER.
VERS = VERSION ID.
APRCH = BLANK FOR STRUCTURAL ANALYSIS. HEAT FOR HEAT TRANSFER ANALYSIS.
SEMG = STIFFNESS AND MASS MATRIX GENERATION STEP.
SEMR = MASS MATRIX REDUCTION STEP (INCLUDES EIGENVALUE SOLUTION FOR MODES).
SEKR = STIFFNESS MATRIX REDUCTION STEP.
SELG = LOAD MATRIX GENERATION STEP.
SELR = LOAD MATRIX REDUCTION STEP.
MODES = T (TRUE) IF NORMAL MODES OR BUCKLING MODES CALCULATED.
DYNRED = T (TRUE) MEANS GENERALIZED DYNAMIC AND/OR COMPONENT MODE REDUCTION PERFORMED.
SOLLIN = T (TRUE) IF LINEAR SOLUTION EXISTS IN DATABASE.
PVALID = P-DISTRIBUTION ID OF P-VALUE FOR P-ELEMENTS
LOOPID = THE LAST LOOPID VALUE USED IN THE NONLINEAR ANALYSIS. USEFUL FOR RESTARTS.
SOLNL = T (TRUE) IF NONLINEAR SOLUTION EXISTS IN DATABASE.
DESIGN CYCLE = THE LAST DESIGN CYCLE (ONLY VALID IN OPTIMIZATION).
SENSITIVITY = SENSITIVITY MATRIX GENERATION FLAG.

No PARAM values were set in the Control File.

1 * * * END OF JOB * * *

No Symbolic Replacement variables or values were specified.

Luca Cavagna

As far as I understand, you are defining an RBE reference point from nodes which have only solid elements (solid element do not have rotational stiffness associated). So you need to correct your RBE3 cards and use only 123 instead of 123456

SEONG

https://community.altair.com/discussion/comment/189346#Comment_189346

Thank you.

But MDLPRM, RMRBE3RT, 1 to
automatically remove dof 456 from the REFC on these RBE3s.
How do I do this??