I am a bit confused by your implementation. I was able to open your VI but there are a lot of subVI missing. Anyway, it looks like you have a while loop in parallel with a case statement. Any it seems like you are asking to have the while loop generate a condition that will select either the true or false for that case statement. The way you currently have it the case statement will try to execute once at the same time as the while loop. If you wire (for example) a local variable that is generated in the while loop it will read a value that was default and not from the while loop.
In your bottom structure (case with a while) I think you need to rearange the order of the structures and have the case inside the while loop. If not, then I will need some more info on what you are trying to do. Basicly what I am suggesting is for each iteration of the bottom loop, use the case statement to check you interlock.
If you make that change, to get the data from the top loop to the bottom loop you can use the queue or notifier functions, local variables, or functional variables.
