Cannot maintain the item configuration for BOM version

i got the error “BOM for item xxxx has not been set up” when i go the “Engineer → Maintain Configurations”,

i think i have already approved and activated the BOM and versions.

anything else that i have to do before i configure the product configurations?

You should be looking at Engineer=> BOM=> Lines form for the active version of your BOM. Make sure that the version is approved and active.