ERROR with RFC call from SAP ECC6.0 to BC 4.8. Unknown Partner and Message Type.

Hello everybody,

I have a problem.

I has connected BC 4.8 with SAP R/3 4.7 and its work fine with RFC calls from R/3.

now, we have a new SAP ECC 6.0 server and I create a new sap server, create a new listener, and new RFC destination in ECC 6.0.
all test work fine. listener started and state Alive.
in BC not change RFC, I only add new server and listener.

but when I execute an Function Module RFC (in ECC6.0) with the new RFC Destination created I get the following error:

00000F [B2B-SAP.0001.0014] Error in RFC:InboundProcess: Unknown Partner and Message Type. Sender: TST400 Receiver: BC_AEI MsgType: ZAEIRFC_FEXDUMMY

000010 [B2B-SAP.0006.0008] Error in inbound call for ZAEIRFC_FEXDUMMY from EPSA_TST_ECC_6.0: com.wm.app.b2b.server.ServiceException: Unknown Partner and Message Type. Sender: TST400 Receiver: BC_AEI MsgType: ZAEIRFC_FEXDUMMY

000011 [B2B-SAP.0004.0020] Listener session 5+amCbKV2gbtcISbFFjqvGhyIxRI=5555-75 closed due to error: Unknown Partner and Message Type. Sender: TST400 Receiver: BC_AEI MsgType: ZAEIRFC_FEXDUMMY

I copied this messages from the BC Monitoring.

what might be happening?

best regards,

nicolas./