.f06 doesn't update, but job is running since very long time

I run the Nastran jobs on Linux Server, for this particular job, it is still running since 14 Days and the last update of .f06 was 10 minutes just after i started the job. There has been no update in any output files since last 14 days. There is no FATAL ERROR. Any reason known, or any workaround?

0 Prafulla Kulkarni over 6 years ago

I think, there must be some issue; check your log and f04 file as well, if you see any progress there. 14 days time is too much without updates. Which solution you are running and what is approx DOF? If no progress in any file, better kill the job and resubmit it again.
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0 Martin MSC Nastran over 6 years ago

When checking the .f04 note which module is running. READ and DECOMP (DCMP) are matrix solvers and will list the DOF count and memory statistics. If you have a big model and supplied insufficient memory then the matrix 'spills' to the disk. This invokes I/O which is a wall clock killer. I have had very small jobs run 10 days due to highly inefficient matrix routines (high I/O).
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0 Viplava over 6 years ago

Hi Martin, Can you suggest what to do next?

.f04 is in attachment.

It's a SOL101

Attached Files (1)

test.f04.zip
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0 Martin MSC Nastran over 6 years ago

VERSION 2013.1.0

SEMTRN

3391292:GRID

20347752 DOF

1342177280 WORDS 10GB

SEKRRS 79 DCMP BEGN

You are running V2013 and SOL 112 with a 20MDOF model and only 10GB of memory for Nastran. Major spill (virtual memory) is occuring. Kill the job. How much memory does the machine have? MEM=ESTIMATE might be a good starting point. It appears you have surface coated solids? Sizeable number of DMIG and RBE3.

Add 'DIAG 8' right after the SOL line in the data deck. This will give you matrix stats in the .f04. DOF counts at the set level and matrix densities will be useful in memory diagnostics.
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