Unexpected error: System.NullReferenceException

[avionics]

Hello , 

I have been experiencing a weird issue recently where NextPVR seems no to be able to use my 2 USB tuners. Restarting the NextPVR service or rebooting the computeur seems to work once out of four times, and when the tuner becomes available, it is only for few hours before beiing unavailable again.

I forced a reinstall of NextPVR and the tuner drivers but the problem is still here. I also tried with me kernel isolation off on Windows with no success.

Here are the logs stating "Unexpected error: System.NullReferenceException" when trying to use the tuner.

The tuner model is Hauppauge WinTV Dual-HD on a Windows 11 26H2 and nextPVR is the only program accessing the tuners.

Any idea of what could be the problem ? I've been trying to find a fix during the last days without any success

Thanks in advance.

Pierre.