Too many columns in row &1.

What causes this issue?

Row &V1& of the input file has too many columns.
The number of allowed columns can be calculated as &V2& from the number
of column descriptions after the control record in row &V3&.

System Response

Processing terminates.

How to fix this error?

Check the input file. If it was created by a standard SAP program, you
may want to contact the SAP Hotline.

Error message extract from SAP system. Copyright SAP SE.