I did
if(!(request = (MPI_Request *)malloc((size-1)*sizeof(MPI_Request)))){
printf("ERROR");
exit(1);
}
And did not get any "ERROR" message. Also there is no reference to request after malloc and before the MPI_Isend call. I did printf the value of j just before MPI_Isend and it is really zero. The strange thing is when j is 1, 2, 3, ... MPI_Isend works. Also if I declare a vector request of a large enough size it works, but of course it would be much better if I could malloc the appropriate space.
Thanks,
Leonardo.
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