Extended rebate is not active in agreement &1.

What causes this issue?

The extended rebate is not active for the agreement type used.

System Response

It is not possible to process standard rebate agreements with this
program. Only the sales volume is displayed and other processes are
cancelled.

How to fix this error?

Use the standard settlement program (transaction VB(7 ) or activate the
extended rebate settlement for the agreement type used.

Procedure for System Administrators

You can find the transactions for activating the extended rebate
settlement in Customizing under
Sales and Distribution -> Billing -> Rebate Processing -> Extended
Rebate Processing -> Activate Extended Rebate Processing
and
Sales and Distribution -> Billing -> Rebate Processing -> Extended
Rebate Processing -> Simulate And Execute Reorganization Of Statistical
Data.

Error message extract from SAP system. Copyright SAP SE.