SAP Message BOM633 - Subitem for item &1 &2 in BOM &3 &4 was not transferred.

Diagnosis An error occurred while reading the subitems of item &V1&, &V2& in BOMV3 v4. System Response The property 'Subitem Available' must have been reset for the resultingsales order -/ work breakdown structure BOM for these components. Thesubitems could not be transferred. Procedure Ensure that the subitems are available in the source material BOM, sothat they can be correctly transferred into the resulting sales order -work breakdown structure BOM.