Thank-you for your prompt response.
Sorry if I'm asking stupid questions but I'm a beginner.
I'm using DepthAI version 3.4.0
I can't run cam_test.py
I thought it was coming from the usb cable so I changed and it's still the same.
I installed DephtAI on another computer... same thing
I thought it came from the OAK-D but even without plugging it in, as soon as I launch the program, the message appears immediately.
It's weird because a while ago, it worked but it must have been a previous version of DepthAI
thank you for your help