How To Fix UCT8260 - &2 is incompatible with external format for source field &1

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 260

• Message text: &2 is incompatible with external format for source 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 external format because the
Conversion Exit indicator has been selected in the move operator for
field &V1&. However, the value &V2& is incompatible with the external
format.
See also the other message issued along with this message, which provide
s detailed information about the error.

System Response

The system cannot derive the source selection for source field &V1&. Bec
ause of this, the system might read more data than was originally
intended. This can lead to performance issues.

How to fix this error?

Examine the mapping rule used by source field &V1&. Examine the
Conversion Exit indicator in the move definition, in particular. If &V2&
is indeed in the SAP-internal format, you should deselect the
Conversion Exit indicator.

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.