[mpich-discuss] crash on 2^31 size in MPI_Win_allocate_shared(...)

Dear mailing-list, this is my first time posting here. I found that with version 3.0.4 using MPI_Win_allocate_shared i get an error when using a size exactly 2^31 everything below and above is ok. Though i also had the same issue with 2^34. Some kind of division or type conversion seems to be off. (/dev/shm has 4G so it is not a size issue.. i know what those errors look like) I attach my code and the output i get on a linux (debian 6.0) 64 bit machine (same issue on a mac though) . I'll be happy to provide more machine details or everything you guys need to analyse whats going on. with kind regards, Steffen Weise