[mpich-discuss] MPI_Win_free failed

Sufeng Niu sniu at hawk.iit.edu
Tue Jul 23 17:55:55 CDT 2013


I used MPI_Win_free, and it returns error code: 45, Invalid MPI_Win. I
checked all my code, but I still cannot find out where is the problem. I
was wondering any one can give a suggestion?

I defined win as
MPI_Win win;

in RMA, I create a sub communicator: MPI_FOR_WORLD
MPI_Win_create(image_buff, 2*image_info->image_size*sizeof(uint16),
sizeof(uint16), MPI_INFO_NULL, MPI_FOR_WORLD, win);

In other MPI_FOR_WORLD process:
MPI_Win_create(MPI_BOTTOM, 0, sizeof(uint16), MPI_INFO_NULL, MPI_FOR_WORLD,

I use MPI_Get, just as normal thing. no mem violation.

free it as

I still cannot figure out why it keeps saying MPI_Win_free failed. Thank
you very much for any suggestions.

Best Regards,
Sufeng Niu
ECASP lab, ECE department, Illinois Institute of Technology
Tel: 312-731-7219
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