However, this did not help, C1RFM did not start. I decided to restart all models on C1SUS machine in hope that C1RFM uses some other models and can't connect to them but this suspended C1SUS machine.
This happened because of the code bug -
// If PCIE comms show errors, may want to add this cache flushing
if(ipcInfo[ii].netType == IPCIE)
clflush_cache_range (&(ipcInfo[ii].pIpcData->dBlock[sendBlock][ipcIndex].data), 16); // & was missing - Alex fixed this
After this bug was fixed and the code was recompiled, C1:OAF_MCL_IN is OK, no errors occur during the transmission C1:OAF-MCL_ERR=0.
So the problem was in the PCIE card that could not send such amount of data and the last channel (MCL is the last) was corrupted. Now, when Alex added cache flushing, the problem is fixed.