A last disc calibration must be performed.
1. In PTPublisher, Go to the Tools Menu - Calibrate the Disc Publisher. (For Mac: Go to the PTPublisher Menu - Calibrate Robot)
2. Find the "Other Calibrations" section at the bottom.
3. If the error occurred after the disc was placed in the printer, click "Calibrate Disc in Printer".
4. Follow the prompts to complete the calibration.