Hi, Your problem doesn't seem related to MPI. You should ask general programming questions in different forums, such as StackOverflow. In addition, a debugger (e.g. gdb) would help you to identify the problem. Best, Antonio On 12/19/2013 04:53 AM, Soheil Hooshdaran wrote:

Hello. My program produces Segmentation fault on uncommenting the lines 99 and 100. I could find no error on those lines, so please help me.I will attach the program

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-- Antonio J. Pe�a Postdoctoral Appointee Mathematics and Computer Science Division Argonne National Laboratory 9700 South Cass Avenue, Bldg. 240, Of. 3148 Argonne, IL 60439-4847 [email protected] www.mcs.anl.gov/~apenya