Enhancement identifier for routine number &1 must exist.

What causes this issue?

For the combination of routine number &V1&, process enhancement option
&V2&, process enhancement option task &V3&, and implementation type &V4&
, there is no enhancement identifier (ID) assigned therefore the system
is not able to find an enhancement ID.

System Response

The enhancement implementation cannot be called.

How to fix this error?

IF &[SWITCH]S4H_DOCU_ON_PREMISE& = 'X'.
Assign an enhancement ID to this combination in Customizing activity
<LS>Set Condition Formula for Alternative Calculation of Condition
Amount</>.
ENDIF
IF &[SWITCH]S4H_DOCU_CLOUD& = 'X'.
Assign an enhancement ID to this combination in configuration step <LS>
Set Condition Formula for Alternative Calculation of Condition Amount
</>.
ENDIF

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.