Solution : https://service.sap.com/sap/support/notes/103971 (SAP Service marketplace login required)
Key words :
choose option 'process purchreq, additional key words check_posting_possible, program termination occurs, system displays, dialog box, purchase requistion, convert_no_number, prerequisites, correction, attachment
Related Notes :
| 113705 | PReq not generated for non-stock material |
| 71537 | No PReq if required entry fields not filled in PReq |