Data Conversion 

Once you have determined the SAP data structure, you should:

·        Determine which fields can be transferred directly from your existing data. There is a direct match between an existing data field and the corresponding SAP data field.

·        Check which fields must be converted to adapt the existing data to the requirements of the SAP system.

Converting data from the old format to SAP format

Your program must format legacy data just as an online user would when typing them in. In particular:

·        The data must be character format.

·        The data itself must not be longer than its target SAP field.

·        If the data is shorter than the target field, you must left-justify it within the SAP field (pad it with blank characters at the right end).

·        If the transaction for a field is to keep its initial value, use the NODATA character.