Invalid MPI_Request

Hi! There,
I met the following problem when I run croco parallelly on the HPC. The error message is:

Fatal error in PMPI_Wait: Invalid MPI_Request, error stack:
PMPI_Wait(194): MPI_Wait(request=0x7fffd5d87014, status=0x7fffd5d86d84) failed
PMPI_Wait(142): Invalid MPI_Request
Any help?
Thanks in advance,
Cheers