Unconstructed message – after call orch in loop

the reason why you can’t construct a message in a loop is because a message can only be constructed once 🙂

\”A very important concept to understand is that all messages are immutable in BizTalk Server 2004. This means that after a message is constructed, it cannot be changed. \”

from

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/BTS_2004WP/html/1e2e50f7-6609-4eb2-a9a1-3a951700f840.asp