UCT8040 - Mapping rule for &1, row &2: Conversion error with constant &3

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 040

• Message text: Mapping rule for &1, row &2: Conversion error with constant &3

What causes this issue?

The mapping rule for target field &V1& contains a move in row &V2&. The
move contains a concatenation rule with constant '&V3&'. The
<LS>Conversion Exit </>indicator is selected. The system wants to
convert constant '&V3&' to SAP-internal format but the constant does not
have a valid external format for the target field.

System Response

The settings cannot be saved. The system issues this error message along
with other messages that explore the error in more detail.

How to fix this error?

Review the detailed error messages regarding this conversion error.
Change the constant so it has a valid external format. Alternatively, if
the constant already has an internal format, deselect the <LS>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.