Pretty simple, I have one vi (main VI) that gather all the data and another vi that process the data. I would like to have a button that once pressed opens the other VI. Thanks, RoddyR&D LV2009

You need to break the problem down into two parts: respond to a button, and launch a VI. The first part is easy, as that involves using an event structure (assuming you have the Full Development System or higher). There are examples that ship with LabVIEW that show you how to use an event structure. Just search for "event driven". The second part depends on what kind of "launching" you want to do. If you just want to pass control over to this other VI then you just need to have the subVI on the block diagram of the calling VI when you process the button event. You then just pass the data into it via the subVI's terminals. If, on the other hand, this other VI needs to run at the same time as your caller VI then you need to launch the VI dynamically using the VI server. This will launch the second VI and then return to the caller so that now both VIs will be running. You can do this using the VI Server with something like this: Message Edited by smercurio_fc on 11-11-2009 12:50 PM