"dapl fabric is not available and fallback fabric is not enabled"

HI Support team,

I try to use  Intel MPI  "with DAPL fabric " to run a molding simulation software on Infiniband/RDMA Fabric.

But get error - "dapl fabric is not available and fallback fabric is not enabled"

Detail info:

Cluster  nodes:
CPU: Intel Xeon E5-1620
RAM: 32 GB
NIC: Mellanox ConnectX-5 VPI adapter
Driver: WinOF-2 v2.10.50010
OS: Windows Server 2016 Standard

Test Case1:
Using Microsoft MPI - Microsoft HPC Pack 2016 Update 2 + fixes , the Results is works well on infiniband fabric.

Test Case2:
Replace MS_MPI with Intel MPI(IMPI) - Intel MPI 2018 , the Results - Get error - "dapl fabric is not available and fallback fabric is not enabled" when execute Intel MPI command. My command is as below:

Command: c:\Users\Administrator>"C:\Program Files\Intel MPI 2018\x64\impiexec.exe -genv I_MPI_DEBUG 5 -DAPL -host2 192.168.191.21 192.168.181.22 1 \\IBCN3\Moldex3D_R17]Bin\IMB-MPI1.exe

Please advise,

BRs,

Jeffrey