Solution : https://service.sap.com/sap/support/notes/625812 (SAP Service marketplace login required)
Key words :
sap standard system -> business add-ins, badi includes customer-specific checks, customer-specific error message, additional general message bca_po805, decision dialog box, basis -> abap workbench ->, import support package 9, function group bank_mapi_msg, function module bca_po_obj_badi_cust_check, function module bca_po_obj_badi_cust_save
Related Notes :
| 578319 | Addition of parameters to function module |
| 317129 | Creating a function module |
| 305789 | Creating messages |