[Bongle]

If you haven't already, use the "target console" in windriver or the serial output on the cRio to find out what symbols aren't loading.

Make sure you're using matching versions of the cRio image (v27, for example) and WPILib.

Make sure that all your CPPs are added to windriver and are actually getting compiled (easy test: insert compile errors in them and see if you fail to build your project). Having a definition in a .h file but forgetting to include the cpp will allow you to compile, but it'll fail once it is on the robot.