I have encountered the following warning message, and FEMAP refuses to read any results although the analysis completes with no Fatal errors:mad:.
^^^ USER WARNING MESSAGE 9031 (ERRPH1)
^^^ NOGO ENCOUNTERED IN SUBDMAP SEMG
*** USER INFORMATION MESSAGE 4110 (OUTPX2)
END-OF-DATA SIMULATION ON FORTRAN UNIT 12
(MAXIMUM SIZE OF FORTRAN RECORDS WRITTEN = 1 WORDS.)
(NUMBER OF FORTRAN RECORDS WRITTEN = 1 RECORDS.)
(TOTAL DATA WRITTEN FOR EOF MARKER = 1 WORDS.)
1 1G LIMIT JULY 12, 2010 NX NASTRAN 1/17/09 PAGE 9
* * * * D B D I C T P R I N T * * * * SUBDMAP = PRTSUM , DMAP STATEMENT NO. 28
SOULTION: this is actually a FATAL error, bad elements need to be fixed.
Although 9031 is just a warning error, it is very serious because this means
that NASTRAN cannot generate an element stiffness matrix because of the bad element shapes. In *.f06 file, NASTRAN will list the elements that violated the criteria.
Normally if you remesh the model with smaller element size, the element shape will improve.
The other option, as suggested in *.f06 file, is to raise the tolerances. The risk is to lower the solution accuracy. If the violation is small, then this is a quicker solution than remesh.