I need to create a BPM that waits for an IDoc to process before sending another IDoc. I believe i need to create a feedback message, Message Interface and all the mappings before i can start creating my BPM. Problem is i don't know how to go about creating this feedback message. How do i know what it should look like or where do i get info from that tells me. Is there something i can download that corresponds to the IDoc i am using. In this case it is Debmas and Cremas.