I am working on fault tolerant code

and using the mpix_comm_shrink call

to exclude the failed processes from the

communicator.

Everything seems to be working fine if 

the size of the communicator is 32 or smaller.

If I increase the size however, the mpix_comm_shrink 

call fails (hangs).

Is this a known issue and is there any workaround to

enable this call for larger communicators?

Thank you!

Atis