Quantity Conversion Interface: Import parameters <> program parameters

What causes this issue?

The import parameters structure name specified in Table OIB04 does not
correspond to the actual import parameters required by the quantity
conversion function routine(s) (for example: the API c-code routines).

How to fix this error?

Check the entries in Table OIB04. Check the structures in the ABAP Data
Dictionary and change them to match the anticipated import parameters
within the function routines called: i.e. field type, length, and the
order of sequence.

Error message extract from SAP system. Copyright SAP SE.