error code 4

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The job input file "7-24.inp" has been submitted for analysis.
Job 7-24: Analysis Input File Processor completed successfully.
Job 7-24: Abaqus/Explicit Packager completed successfully.
ERROR in job messaging system: Error in connection to analysis
Error in job 7-24: The executable explicit.exe aborted with system error code 4. 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.
Job 7-24 aborted due to errors.

小弟以前用abaqus6.10和core i3 2120 双核处理器计算的时候没有这样的错误，但自从换成了E3 1230 V2四核处理器和abaqus6.12时，计算总是出现上述错误，望高手赐教啊，我有个疑问，abaqus最多支持几核的处理器啊