General Purpose Signaling with LabVIEW 7

Question

I need LabVIEW 7 to handle the following situation. I have 3 concurrent VI's - A, B and C. A and B want to hear different sets of "signals" from C. Specifically, A wants to hear only signals 2, 4 and 6 while B wants to hear only signals 1, 3 and 5. These sets are arbitrary and NOT known at compile-time. Furthermore, A and B can listen for their signals one or more at a time, service any received signals, and loop to listen for one or more additional signals. Neither A or B want to poll and both must hear all their respective signals regardless of the order they are generated by C and regardless of the order A and B choose to listen for them.
LabVIEW 7 Notifiers almost solve this problem except for the timestamp feature that
prevents notifications from being received out of order. For example, if C sends notifier 1 to B while B is waiting on notifier 3, and then C sends notifier 3, notifier 1 will NEVER be heard by B (unless, of course, B has a Wait on Notification icon on his diagram for each possible notification he is to receive).
User defined events look very promising for solving this problem but I am not sure how to get the event structure to hear different sets of events (not known until run-time) at different times. For example, A may first want to listen for signals 2 and 4, say with a timeout, and then listen for signals 4 and 6.
Any insights into solving this problem would be appreciated.
W. Brown

Answer 1

Attached is a workaround that answers this problem.
W. Brown
Attachments:
Notifier_Problem.llb ‏91 KB