A issue that I've had that might help someone else out. I could not get the "gyro" program to run. I had many issues and with much digging and much help of people here. I found one thing that finally got it to work. Arduino part of sketch work processing part wouldn't. A simple thing to check is your video car. while is only 3 years old it as a major problem. process gave a frame rate error and stopped. Changed a new card Nividia geforce d610 and it finally worked. I have to think that the older one just didn't support a high enough frame rate. A little more information to help out
1st card 256meg pcie card
2nd card also pcie, but with 2meg memory.
Just a little more information for the debugging trail