SAP Message BON_ENH_MESS104 - Error converting from &1 to &3

Diagnosis
It has been entered in Customizing for generating the variable key forthe extended rebate processing of the agreement type &V4& that thefield &V1& of the communication structure &V2& shall be copied into thefield &V3& of the structure KOMFKGN. An error occurred during thisprocedure.

System Response
The contents of the variable key cannot be copied into the structureKOMFKGN. The data contained is not copied into the credit memo.

Procedure
Adjust the Customizing settings for generating the variable key. Makesure the source and target fields are compatible.