Error in MPI whn debugging with PGDBG

Hy everyone,

I’m tring to understand how PGDBG works because I have a bug in my MPI code written in Fortran 95. Actually my speciality it’snot at all in programation but now i see myself obliged to use it.
To be short, I have this error message:

*** An error occurred in MPI_Isend
*** on communicator MPI COMMUNICATOR 4 SPLIT FROM 0
*** MPI_ERR_RANK: invalid rank
*** MPI_ERRORS_ARE_FATAL (your MPI job will now abort)

Does somebody has an ideea about what coudl it be?

Thanks in advance for your help.

Sincerily ,

Hi Anca,

This means that the value for the destination argument is invalid. It should be an integer from 0 to the maximum ranks minus one.

  • Mat