Customizing settings missing for product type &1: Interest calc. method

Trados = TR

What causes this issue?

In Customizing you need to make an entry for the interest calculation
method for product type &1. The system cannot save an effective interest
rate for the transaction and cannot determine an effective interest rate
for OTC transactions (financial transactions that create a position)
during runtime for reporting (in the logical databases).

System Response

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

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.