IVI unrecoverable failure at initialization with nidmm and niswitch

Hi all,

I've developped several test benches with PXI chassis including DMM (PXI-4065) and Switch (PXI-2432) cards, and using Python to communicate with the equipments. Computers are running on Windows 10 Pro (x64) and I'm using the NI 20.0 drivers and Python 3.7 with the most recent modules for NI. All of the set up were running nicely but whitin a month, each of these set up went down because the nidmm.session or niswitch.session used to initialize the cards lead to an IVI unrecoverable failure at initialization. Would you have an idea of what could be the root cause of the issue which is occuring on every of the systems ?

Thanks a lot