When updating the subpanel you need to force an update otherwise the redraw is missed.

I noticed this when loading front panels that were shifted a few mm and it looked ok but
when you pressed a button, nothing happened.
It appeared to be that the actual button was a few mm shifted from the drawing.
by forcing a redraw (minimising and opening again, or by hiding the front panel with another window)
the error became clear.
In the subvi a redraw is forced by modifying the background color of the transparent background.
You don't see it but it helps.
 subpanel_update_bug.zip ( 49.52K ) Number of downloads: 244