I have a simple sub that just has a For loop with the usual index. I want to pass the index to the main vi program and first tried pasing through a wire and connector output to the sub. However, the index does not pass since the loop is busy in the sub. I can use a Global variable but the index just goes to the global variable front panel. How do I get the index numerical value to the front panel of the main vi?

Create a reference to your Index in your main.vi and pass this to the SubVI. In your SubVI write your index value to the Property Value. Dont forget to include the reference on you connector pane

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Passing Data from a sub

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Yes indeed but this is only a test program for something much bigger which I don't need to stop. Nice to know how to do it though.

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Passing Data from a sub

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