Diagnosis
You will see that problems can arise if sender fields are assigned toreceiver fields and the fields are of different types. Invalid valuescould appear. Usually an ABAP command MOVE is carried out. This commandhas a special logic for the type conversion and may not always besuitable. See the ABAP documentation for the rules on type conversion.

Procedure
If, for example, you wish to convert fields from data type N or C todate fields, check first in a test run whether the results are correct.Alternatively, you can set the fields in the sender structure to the'correct' type. Then during an import, the system checks if the fieldshave been filled correctly for their type.