Solution : https://service.sap.com/sap/support/notes/667161 (SAP Service marketplace login required)
Key words :
issue error message vl 331, 'dynpro_msg_in_help' runtime error, delete delivery groups, source code corrections, delete delivery items, program error, delete originally, delivery group, dependent items, deletion logic
Related Notes :
546719 | FAQ: Delivery group and BOM in the delivery |
521409 | Problems with deleting delivery items online |