Problem: The flow editor does not prevent you from
adding connections that wire the execution path of a flow back onto
itself (at an earlier point in the flow's execution path). This situation
may not cause errors when you generate runtime code. However it is
very likely to lead to errors during runtime processing.
Workaround: When you want part of a flow to be iterated
multiple times so long as a certain condition is true, use a While
node (see the topic "Creating a loop" in the Enterprise Service Tools
documentation).