That is what I thought, but the OBR IS optional in the outbound variant. I even went so far as to add the OBR to the inbound variant as optional, but I still have the same message. What was most confusing was that before I put the OBR in the MDM (inbound) variant, the message was telling me that the OBR can’t be found in the MDM, even though there was no OBR in the inbound message!
