WPILib version 4.2 for C++ seems to have a camera problem

[Randy Forgaard]

There seems to be a problem when using WPILib version 4.2 for C++ 4.2 with the Axis 206 camera. Here are the specifics:

We were originally using the WPILib 4.0 release for C++, but we were having trouble getting reliable performance when programming the Axis camera to look for the vision target in the images.

When WPILib 4.1 for C++ version was released on 2/3/2010, it was great, because it fixed all of our camera programming problems, and also provided support for the ADXL345 accelerometer in the 2010 Kit of Parts, which has been very useful for us as well. However, WPILib 4.1 prevented DriverStationLCD functions from working. More specifically, when using WPILib 4.1 and running NetConsole, we see a problem with a DriverStationLCD symbol:

Warning: module (t1) deleted: errno=1835009 (x1c0001) status=1
_ZN16DriverStationLCD11kLineLengthE.
(unloading partially loaded module FRC_UserProgram.out)
...FRC_UserProgram failed to load.

So then, WPILib 4.2 for C++ was released on 2/8/2010 to fix this problem with DriverStationLCD. And indeed, DriverStationLCD is fixed. But in WPILib 4.2 for C++, there is now a new problem with the camera. Whenever we use any of the Axis camera C++ functions with WPILib 4.2, the camera doesn't work. When running NetConsole, we once again see a problem with an external symbol, but this time the problem symbol is in the camera code. That seems to be the source of the problem.

We would really like to use the camera. Is anyone else seeing this problem? Does anyone know if a new WPILib release will be coming out for WPILib 4.2 for C++ to fix the camera problem? Many thanks!