SAP Message VE806 - The communication structure & is unknown

Diagnosis
The program uses the agreed communication structures to transfer thedata. Communication structure &V1& agreed for usage &V2& andapplication &V3& does not exist.

System Response
The system terminates processing.

Procedure
Check structure &V1& in the Dictionary and check registration ofapplication &V3& in usage &V2& (entry in table T681Z).

Procedure for System Administration
Check whether all the transfers have arrived in the system and makesure that they are consistent.