I am trying to send an IDOC to a Non ABAP system. The receiving system consists of an "IDOC Listener" which receives and sends. The RFC Destination for the connection between the PI and that system is type T (TCP/IP). When checking it in SM59 or IDX1 on the PI, everything looks fine - connection works. Still when I try to send a message, the adapter call fails with the message "RFC Destination incorrect". Is it necessary to have a type 3 (ABAP system) connection for the IDOC adapter and if yes, is there any way to bypass this? The scenario works fine if I communicate between a standard R/3 4.7 and the 3rd party system (even with the type T destination) - nevertheless PI is intended to be used in between for monitoring etc. - therefore the direct R/3 <-> 3rd Party scenario is no option for me. Any clues highly appreciated.