Abnormal Termination Error

[khanolkar]

Dear All,

I have an error while running an ABAQUS simulation with a UMAT. I have been using this for past month and i am unable to figure out whats this error about.

Error in job Job-1: The executable /afs/cad.nji t.edu/solaris/abaqus-6.4.4/6.4 -4/exec/standard.xaborted with system error "abnormal termination signal" (signal 6).please check the .dat, .msg, and .sta files for error messages if the filesexist. if there are no error messages and you cannot resolve the problem,please run the command "abaqus job=support information=all" to report andsave your system information. use the same command to run abaqus that youused when the problem occurred. please contact your local abaqus supportoffice and send them the input file, the file support.log which you justcreated, the executable name, and the error code.
Job Job-1 aborted due to errors.

Thanks in advance

[ashu28]

This is a very common message and can get generated in a lot of cases, like division by zero, square root of a negative number, etc. What I would do is test my UMAT for a sample input and see if the results from my UMAT are in line with the expected results. I would add a lot of write statements to keep track of the calculations and locate the exact source of errors.

--Ashu

[khanolkar]

Ashu,

Thanks for your reply. I will try to see if that works.

[khanolkar]

hey ashu,

I have tried what you have suggested checking for division by zero and I browsed through the entire UMAT...its still not working.

I will appreciate if you can let me know if there is something in addition that needs to be done

Thanks

[Nicksen]

Last time I got this message I tried t write some data to a file. I used the subroutine UEXTERNALDB to open and to close the file. The error occured because of a wrong statement in the opening request. Instead of "status=NEW" I had to change to "OLD" because of the fact, that the filename still existed. So perhaps your error is due to I/O or read/write permissions or something like that.

best regards
Nicksen

[khanolkar]

hey Nickson,

Thanks for the reply. In fact I have started to use ABAQUS couple of days back and I am not able to figure out.

Can you please write about this opening file and customizing in detail. I would be obliged.

Thanks a lot

[Nicksen]

If your error is the same like my error, you will have to find out if you try to write to a file for which you have either no writing permmisions or that doesn't exist yet.
In my case there was a conflict because of the fact, that ABAQUS tried to create a file, that was already there and could not establish the requested file name.

You use the routine UMAT and I am not familiar with it. But if you try to write to a file, be sure that you have the nessessary permissions and that you entered the right path to the file.

I hope that helps but be aware that this error message is very common and my comments are only a few suggestions and assumptions.

best regards

Nixon