How do I do multiple restarts is ABAQUS ?

Hello All,

I have been trying to restart an ABAQUS simulation using the command line. The following works fine

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abaqus job=restart1.inp oldjob=OLD user=UMAT.f cpus=160 scratch=$PWD interactive

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But when I do the restart for the second time like the following, It gives me an error

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abaqus job=restart2.inp oldjob=restart1 user=UMAT.f cpus=160 scratch=$PWD interactive

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Error :

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Abaqus Error: The executable pre aborted with system error "Abnormal termination signal" (signal 6). Please check the .dat, .msg, and .sta files for error messages if the files exist. If there are no error messages and you cannot resolve the problem, please run the command "abaqus job=support information=support" to report and save your system information. Use the same command to run Abaqus that you used when the problem occurred. Please contact your local Abaqus support office and send them the input file, the file support.log which you just created, the executable name, and the error code.

Abaqus/Analysis exited with errors

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Any help would be highly appreciated.

-Prithivi