Input parameter RFC lookup does not exist

Hi All,

In PI an existing successful scenario and was working fine in all environments - Idoc to Proxy xml , where RFC lookup been used to fetch the data from back end system and used in message mapping.

All of a sudden, in PI we are getting an error in mapping "input parameter RFC lookup does not exist"

Nothing has been changed in PI and as well as no patching upgrades been done.

I have done full cache refresh

I have stopped and started the channel

I have even done the dummy changes in the channel and activated

Still the issue persists - Please suggest/help me out from this ASAP, as this issue is in production system and the messages are not transmitting further.

Kind Regards,

Pramod.