Error in DFIES data in field &-&

What causes this issue?

The DFIES interface contains fields with the length specifications:
LENG, OUTPUTLEN, DECIMALS, HEADLEN, SCRLEN1, SCRLEN2 and SCRLEN3. These
fields must be numerical, that is, they must only contain numbers. In
this case, the DFIES specifications refer to field:
&V1& - &V2&
At least one of the length specifications specified contains non-
numerical characters.

System Response

This is an internal error on the DFIES interface. The transaction
running must be terminated.

How to fix this error?

As this is an internal error, you cannot correct it yourself. Report
the error to SAP.

Error message extract from SAP system. Copyright SAP SE.