How To Fix UCT8258 - &2 is incompatible with input format for field &1

SAP Error Message - Details

• Message type: E = Error

• Message class: UCT8 - Message class for UCT8(mapping)

• Message number: 258

• Message text: &2 is incompatible with input format for field &1

What causes this issue?

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 the
values that were derived for the source selection. The sys
tem requires that this value is in the correct SAP-internal format
because the <LS>Conversion Exit</> indicator has been selected in the
move operator for field &V1&. However, the value &V2& is incompatible
with the SAP-internal format.

System Response

The system attempts to interpret value &V2& as an external format and
convert it to the internal format. If this fails, the system is unable
to restrict the source selection using source field &V1&. In this case,
the system may read more source data than was originally intended, which
can affect performance.

How to fix this error?

In the log, choose the <LS>Source</> button to display the source select
ions that are used to read the source data. When this appears, examine
values 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 the
mapping 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 is
correct and value (&V2&) derived for the source selection does not
affect 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 not
being 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 any
performance problems, you can ignore this message.
In any event, you have the following alternatives if the mapping rule is
defined correctly, but the source selection on field &V1& is
unsatisfactory:
You can define a source selection for field &V1& in the Customizing
settings for the method on the <LS>Selection</> tab page. Then the
method uses this source selection instead of the source selection
derived 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 the
method uses the result of the INVERT method for the source selection
instead of the source selection derived from inverse interpretation of
the mapping rule.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.