Solution : https://service.sap.com/sap/support/notes/167626 (SAP Service marketplace login required)
Key words :
additional key words pdc, function module 'process_cc2_messages_parallel', free dialog processes, message 'maximum number, maximum number, dialog process, prerequisites number, confirmations runs, transaction cip2, sessions reached'
Related Notes :
312584 | PDC: Confirmations with goods movements |
99284 | RFC exception: RESOURCE_FAILURE |