SAP Message >0646 - Function for agreement of payment amounts is not active

Diagnosis
You attempted to execute the transaction for the manual maintenance ofpayment amount agreements. However, the function for the agreement ofdeviating payment amounts is not active in your system.

System Response
The transaction cannot be executed.

Procedure
Activate the function in the system settings.
INCLUDE FICA_NA_F5 OBJECT DOKU ID TX