Internal: facts were not checked

What causes this issue?

It has been determined during saving that the facts are not checked.

System Response

The system cannot carry out your request because of a program error.

How to fix this error?

Contact SAP and give the following specifications:
the message text and message number
the name of the internal table and of the module/form
the transaction/report
and the entries which led to this error.

Error message extract from SAP system. Copyright SAP SE.