SAP Message AO001 - Transaction &1 is not in table 020 - contact your system specialist

Diagnosis
You selected transaction &V1&.
The technical control for this transaction is in table T020.
There is no entry for transaction &V1& in table T020.

System Response
The system does not continue processing.

Procedure
Contact your system administrator, since this error should not normallyoccur.
Check table T020 for transaction code &V1&.