Solution : https://service.sap.com/sap/support/notes/78119 (SAP Service marketplace login required)
Key words : 
additional key words bapi_salesorder_createfromdata bapi_customerorder_createbapi_salesorder_simulate bapi_customerorder_simulate, prerequisites program errorthe customer, parties/unloading points, party/unloading point, main programs sapl2032, dialog boxes occur, dialog box, create/simulate, sales order, master record
Related Notes : 
       
| 403714 | Dialog boxes for goods recips./unload. point in online store | 
| 109855 | Dialog boxes in SD IACs and SD BAPIs | 
| 86785 | POPUP in BAPI_SALESORDER_SIMULATE |