If you are getting a "fatal" LabVIEW crash that says something like this:
Failure: blahblah.cpp, line xyz in LabVIEW 6.0
Then you might want try checking out the following pages:
http://www.ni.com/support/failure/
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/01b186b5ceb1d07786256747000f4319?OpenDocument
http://www.medicollector.com