Combined profitability analysis active; assess./IIAA should not be used

What causes this issue?

You are using the combined profitability analysis. If you use assessment
in cost accounting, you summarize the information about the primary cost
elements of the original postings. If you use indirect activity
allocation (IIAA), the costs are posted with the allocation cost element
of the activity type, that is, the unique reference to the primary cost
element and therefore to the FI account is lost.

System Response

This message can be configured using transaction OBA5. You can configure
it as an information, warning, or error message.

How to fix this error?

Check the requirements in your company regarding reconciliation with FI
and, where applicable, use distribution or periodic reposting instead of
assessment. If you use an activity network (IIAA), you can no longer
fully reconcile the combined profitability analysis with Financial
Accounting.

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.