I was able to recover mine, so I thought I would share. This will not work in all cases like the poster submitted in http://forums.ni.com/t5/LabVIEW/vi-corrupt/td-p/1256628 where there was a resultant 'Generic Error' dialog, but seems to work on the type where LV just goes 'poof' when you try to open the front panel of the corrupted VI. Maybe like Mike Porter's commenting about in LV2011 here: http://forums.ni.com/t5/LabVIEW/is-there-a-way-to-recover-a-damaged-VI/m-p/1863387
I was working in the block diagram of a simple, single VI in LV2010, just cleaning up some wires, when LV went away w/o any dialog box or warning. I found the autosaved copy and my original from the start of the day corrupted. Any attempt at reopening either VI also resulted in LV disappearing without leave. I also wasn't able to load it via the VIServer and then programatically pop up the BD...
This was my work around:
I opened a new VI in LV. On its blank BD, I selected to add the corrupted VI from the 'Select a VI...' entry at the bottom of the Functions palette. To my surprise it let me add the VI. Its icon was visible, but any attempt to access the front panel caused 2010 to puke. I then decided to use the 'Find and Replace' search to look for a function ('Add') that I knew was in the corrupted VI's BD. The BD of the corrupted VI popped up intact when I double clicked a result in the 'Find' dialog. I was then able to cut and paste chunks of the BD to a new VI and save it.
Hope this comes in handy for someone.
