[mpich-discuss] Debug problem

[zhou li]

Hi

I met some trouble when debugging.

I topolized the processors in MPI_COMM_WORLD to a quare grid. Then sub
devided them into 'col_comm' and 'row_comm'. But every time I use
"MPI_FILE_OPEN" in MPI_COMM_WORLD,  "col_comm" & "row_comm" got cleaned up.
Can you tell me why?

Thanks!

Zhou
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