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CPD 2025-03-26 19:01:00 +01:00
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## Troubleshooting
### 1) General
The program writes information to a log file, which might contain helpful information.
It is located in the cache directory, usually in `~/.cache/cpdctrl-gui`.
1) Restart the connected devices and then the program
2) Check the log file, which might contain helpful information.
It is located in the cache directory, usually in `~/.cache/cpdctrl-gui`.
3) Ask superuser
### 2) The Arduino/LEDD1B does not work
1) Make sure the Thorlabs LED is plugged in, turned on (turn the dial to a non-zero value) and that the switch is in the **TRIG**er position