Solution : https://service.sap.com/sap/support/notes/451909 (SAP Service marketplace login required)
Key words :
additional key words ale, prerequisites lock conflicts occur, idocs remain, partner profile -, transferred immediately, output medium, solution change, source code, transmission, l_idoc_create_wmtoid01
Related Notes :
150202 | ALE: IDoc outbound - IDocs remain in status 30 |