It looks like to me that the vi is running. You have it shut down on error. I do that I am getting errors when I run the vi. I would expect that the code is exicuting differently as a VI and is causing and error that causes the sub vi to shut down. Turn on the light bulb on the sub vi and watch it exicute when you start the direction vi. I bet you are going to see an error on one or multiple loops. This goes back to what I said earlier about changing your code to use the events verses try to do everthing at once. I am heading to lunch I will try and give you a hand getting started when I get back.
Feel Free to ask questions. That is how we learn. I have used Strict Type Defs for the FIFO and the main cluster. This makes it easier to add things with out having to change your code significatly.
Ok I put a while loop around but it has made no difference.
