Solution : https://service.sap.com/sap/support/notes/855829 (SAP Service marketplace login required)
Key words :
user exitmepo mm06e005 reason, customer-specific system messages, exit_sapmm06e_012 user exit, terms cl_message_handler_mm mmpur_message_forced, purchase order header, error message remains, purchase order, system issues, message output, program error
Related Notes :
| 822087 | EXIT_SAPMM06E_012: System message is not deleted (II) |
| 763605 | EXIT_SAPMM06E_012: System message is not deleted |