The BOM items have been created manually in CS01 or CS02. Manually created items have the value SPACE in field STPO-CADPO.
The user starts the function "OmfMatBomComplete" or is using the BOM process during the save-process of a document (ProcessMatBomMaintain).
Now ECTR likes to update this BOM with same component materials. ECTR only changes existing components with STPO-CADPO = 'X' automatically. ECTR returns a warning, that there exist already positions for this material but without CAD flag.