At the competition this year, we had one of the most massive problems with programming. Starting at the day after shipping with our testing robot until competition day 2 of 3, our java programming wouldn't work. Within a hour, we were able to fully program our bot with labview thanks to a few UNLV students. Now to insure this doesn't happen again, we are looking to teach 2 or 3 of our team members labview, including myself; the team leader. We have some old test code to work with.
The first thing I want to know is the basics to creating tank drive, we tried to get it working at competition but the computer didn't seem to let us so we were left to die the rest of the competition with arcade drive. All of us are trained to drive tank drive with a few who know the bits and pieces of driving arcade. I'm gonna watch some youtube tutorials some teams have made to learn and then teach other team members. Anyone able to give me some tips on that?
Also, as soon as competition was back, my computer stopped allowing the build of software saying a VI was missing. I feel it may be a stupid question asking, but what is a VI and what can I do to fix this? I thought maybe it was our coding so I downloaded a old set of labview code from another team and no change. Any tips?
Any tips on anything else would be appreciated.

Here I go!