Irregular distribution is triggered when the define IRREG_DISTRIB is set.
This reproduces the following error on MPI-PT when nproc >=4
{1} nb_wait_for_handle Error: all user-level nonblocking handles have been exhausted
{0} nb_wait_for_handle Error: all user-level nonblocking handles have been exhausted
Irregular distribution is triggered when the define IRREG_DISTRIB is set.
This reproduces the following error on MPI-PT when nproc >=4