Fatal Error in MPI_Irecv: Aborting Job

Question

The following sequence of errors is received when I try to run a problem on four processors. The MPI command I use is mpirun -np 4

I apologize for posting the error mes

Answer 1

Are you repeatedly calling MPI_Irecv? If so, you may not realize that each call allocates a request handle - and these are freed when the message is received and tested for completion with (eg.) MPI_Test. It's possible you could exhaust memory with over-use of MPI_Irecv - or the memory assigned by an MPI implementation for this purpose.

Only seeing the code would confirm the problem.