SAP ABAP Message Number UMG - 021 (UMG) is used by

• Class (1)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Class	CL_UMG_INV_LANG_MANAGER Method: ADD_TO_AMBIG_LIST	Display and handle Invalid Lanuage Keys	SUMIG	BASIS	SAP_BASIS