Error description 237-1303B

Error message

1303B UM: CC%2 %1 CPU1 impermissible instruction processing

Cause of error

Internal software error: There was an attempt to access an impermissible memory area

Error correction

- Please generate a service file soon, reboot the control, and then generate another service file
- Transmit both service files to the Service department for further inspections by HEIDENHAIN