ST-Link/v2 intermittently stops working and must be disconnected and reconnected to USB port. Is there a way to fix this behavior?

[KLock.2]

We are using STM32_Programmer_CLI.exe in a production environment to load firmware. After a few loads (randomly) the ST-Link/v2 is no longer available to the software. The STM32CubeProgrammer shows "No ST-LINK detected". We must disconnect the ST-Link/V2 from the USB port and reconnect it to continue production.

In desperation, I added this command to our production software so that we will know sooner and waste less time waiting for the error to occur: "C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin\STM32_Programmer_CLI.exe -c port=swd FREQ=4000"

The error we receive is "1". I could not find a description of this error in the manual.

Is there any command that I can send to the ST-Link/V2 That might prevent this Problem?

Is there any troubleshooting procedure I can use to track down the issue down to fix it?

[Tesla DeLorean]

Directly connected USB ports, or via hub or docking station?

H​ubs frequently give me quirky behaviour with the ST-LINK

[KLock.2]

Both. We had so much trouble with it directly connected (we had to unplug and replug the USB cable so much the connection started getting loose) that we purchased a hub with switches so that all we had to do was turn the port off and then back on (effectively the same as unplugging/replugging).

[KLock.2]

By the way, we are using a powered USB hub.