| Debugger | Debugging CCD Command Driver |
| ScriptWriter | CCD Command driver that only writes "active" commands to script.in |
| basicCCDCommand | High-level Kappa-CCD PC driver |
| forcedexit | Exception raised when the CCD Server breaks the connection |
| mastershiperror | Exception raised when mastership seems to be lacking |
| poslost | Exception raised when the goniometer loses its position counters |
| protocolerror | Exception raised when the protocol is not followed |
| rangeerror | Exception raised when an error results from a RANGE command |