[DKolberg]

The InterruptVectorLow is defined in the user_routines_fast.c file. It should not be defined in any other file and you only have one user_routines_fast file (did not rename the file). The directions in the read me file indicate that you should copy the code for the interrupt vector into your file.

If you are using the camera, I would suggest you start with that code as the baseline and copy that directory into a new directory and add your user code to that version. It already has all of Kevin's files integrated in so is a good starting point. It is usually easier to create your own c and header file for your code and just call it from the main code. This adds some overhead for the additional call but allows updating to newer base code a lot easier.

Dave