Win_sync can only be used within passive target epochs. You could replace the win_fences with win_locks. --Halim On 4/13/16 11:28 AM, C.Friedrich wrote:

Thanks for the suggestion! Adding MPI_WIN_SYNC in this way: do i = 1,10000 call mpe_win_fence(a,0,Nwin,err) a = a + 1 call mpi_win_sync(Nwin,err) call mpe_win_fence(a,0,Nwin,err) enddo does not work. The compiled executable either issues the error Fatal error in MPI_Win_sync: Wrong synchronization of RMA calls , error stack: MPI_Win_sync(115)..: MPI_Win_sync(win=0xa0000000) failed MPID_Win_sync(1805): Wrong synchronization of RMA calls or simply dies (without writing the numbers). Perhaps I use it incorrectly...

Christoph

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