Have you tried deploying and running an application on your touch panel that does not use shared variables? If so, what is the behavior? Also, how large is your application, and how much memory is available on your touch panel? Do you have any other touch panel devices available to test? You might want to also make sure that you have shared variable support installed on your touch panel. You can do this by right-clicking your TPC target in your LabVIEW project explorer, and selecting to install shared variable support.