I want to know how RSNAST00 calls the respective function module in the ABAB Coding.?
For Example in case of say any Delivery Document Number, when we run RSNAST00 for it giving the proper message type(say in our case LD00 with ALE as a medium)then at what point of time is the function module (say IDOC_OUTPUT_DELIVRY)called in that program. I didnt see a direct call of the function module as such in the program.
I hope I have made myself clear in framing a question.