[mpich-discuss] Destination value is being overwritten during MPI_Isend

[Rajeev Thakur]

Can you print the value of dest just before calling MPI_Isend?


On Feb 17, 2012, at 12:33 AM, coolhead.pranay at gmail.com wrote:

> Hi,
> 
> I encountered a strange problem when trying to send a message using MPI_ISend. The program exits with the following error message
> 
> Fatal error in MPI_Isend: Invalid rank, error stack:
> MPI_Isend(146): MPI_Isend(buf=0x6bbfc0, count=129, MPI_DOUBLE, dest=99, tag=99, MPI_COMM_WORLD, request=0x6bd000) failed
> MPI_Isend(96).: Invalid rank has value 99 but must be nonnegative and less than 4
> rank 1 in job 129  kratos_43452   caused collective abort of all ranks
>   exit status of rank 1: return code 1 
> 
> I am pretty sure that the value of destination is < nprocs. Another strange error is that when I change the tag to 88 the error is almost the same except dest=88, "Invalid rank has a value 88".
> 
> Can tell me possible reasons for this strange behavior ?
> 
> 
> 
> 
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