Intel MPI 2018.4 error

Hi 

    Is there any way of diagnosing what might be causing the following error? 

PANIC in ../../src/mpid/ch3/channels/nemesis/netmod/ofa/cm/dapl/common/dapl_evd_cq_async_error_callb.c:71:dapl_evd_cq_async_error_callback
NULL == context
 

 Intel MPI 2018.4 run using release_mt version of libmpi.so

 I_MPI_FABRICS=shm:ofa

 Running with MPI_THREAD_MULTIPLE on Centos 7.2 with mlx_5 hardware

Thanks

 Jamil