During calibration the indicated motor did not move as expected. The problem may be: (1) the motor is obstructed or up against a limit stop (2) the load on the robot is too large for calibration (3) the motor drive hardware is not functioning or (4) the position encoders are not functioning. Move the robot away from its limit stops and remove any unusual load. Turn high power back on and try to calibrate again. Contact Adept Customer Service if the error persists.