This is not normal, so you have to tell us what is abnormal about the panel
that causes the problem.
Is there any hardware communication in there? .NET, ActiveX, dll's,
XControl, variants, LabVOOP classes? Do you use any properties or methods in
the VI?
Does the problem reproduce when you rebuild the executable? Also if you
change the problem vi a little and save it? You could try to save it to
previous version, and then reload it.
What version of LabVIEW are you using (and what OS)?
Regards,
Wiebe.