SAP Message UCT8258 - &2 is incompatible with input format for field &1

Diagnosis
During execution, the method derives the source selection for source fie
ld &V1& from the mapping rule for the target field. &V2& is one of thevalues that were derived for the source selection. The sys
tem requires that this value is in the correct SAP-internal formatbecause the Conversion Exit indicator has been selected in themove operator for field &V1&. However, the value &V2& is incompatiblewith the SAP-internal format.

System Response
The system attempts to interpret value &V2& as an external format andconvert it to the internal format. If this fails, the system is unableto restrict the source selection using source field &V1&. In this case,the system may read more source data than was originally intended, whichcan affect performance.

Procedure
In the log, choose the Source button to display the source select
ions that are used to read the source data. When this appears, examinevalues selected for field &V1&.

  • If the correct values were selected, you can ignore this message. To pre

    • vent this message from being issued, you can select the indicator in themapping rule used by source field &V1&.
    • If incorrect values were selected, make sure that the mapping rule used
      • by source field &V1& has been defined correctly. If the mapping rule iscorrect and value (&V2&) derived for the source selection does notaffect the overall result, you can ignore this message.
      • If the source selection does not contain the value &V2& for field &V1&
        • and, because of this, source data that is supposed to be read is notbeing read, make sure that the mapping rule has been defined correctly.
        • If the source selection does not contain any value for field &V1&, make
          • an estimation as to how much excess source data is being read and whethe
          r this might affect system performance. If you do not expect anyperformance problems, you can ignore this message.
          In any event, you have the following alternatives if the mapping rule isdefined correctly, but the source selection on field &V1& isunsatisfactory:
          • You can define a source selection for field &V1& in the Customizing
            • settings for the method on the Selection tab page. Then themethod uses this source selection instead of the source selectionderived from inverse interpretation of the mapping rule.
            • You can implement the Business Add-In (BAdI) UC_DATATRANSFER and use the
              • method INVERT to determine the source selection on field &V1&. Then themethod uses the result of the INVERT method for the source selectioninstead of the source selection derived from inverse interpretation ofthe mapping rule.