Solution : https://service.sap.com/sap/support/notes/83854 (SAP Service marketplace login required)
Key words :
attached source code corrections, additional key words cn21, respective item catagory, component procured externally, standard sap system, correct item category, bom explosion occurs, special procurement key, purchase requisition, stock transfer
Related Notes :
102595 | Subcontracting Preqs generated from SD/PS have no components |