MPI_MAXFHANDLES

The maximum number of Fortran handles for objects other than requests. MPI_MAXFHANDLES specifies the upper limit on the number of concurrently allocated Fortran handles for MPI objects other than requests. This variable is ignored in the default 32-bit library. The default value is 1024. Users should take care to free MPI objects that are no longer in use. There is no limit on handle allocation for C codes.