Error while generating simulated interest payments

What causes this issue?

In gap analysis, an error occurred while generating simulated interest
payments for a financial transaction.

System Response

The simulated interest payments are not generated, but the financial
transaction is still included in gap analysis.

How to fix this error?

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.