I'm trying to run a vi (that works fine on it's own) in a subpanel control that's in a tab control. This has got to be the most uninformative error message I've seen since I quit running fortran in dos.
I think a VI loaded into a subpanel (this is what you are doing right?) should already be running, so run the VI (by reference/dynamically) and load the reference into the sub-panel (all examples with subpanels will show this)