====== Tracking system Unresponsive ======

**Symptoms**:
  * Dtrack2 is open on the head node computer
  * Dtrack2 is running (the various cameras are visible)
  * When you bring the main glasses into the CAVE area, the "body id" 2 (under data display) does not turn green.

**Solution**: Perform a [[tracking_system:calibration|re-calibration]] of the CAVE.