This might be caused by traffic related to the COM PORT in use. This indicates that there are many COM # that are in use on your computer.

To rectify this:

  • Go to device manager
  • Double click on the Ports (COM & LTD)
  • Right click on the driver (STMicroelectronics Virtual COM Port)
  • Select properties, select ports & settings
  • Select advance and change the COM Port Number to the smallest one that is not in use.
  • If the issue has not been resolved, unplug the device and delete the COM ports that are not in use, (just keep one).
  • Plug in the device and try again.

If the issue has not been resolved, please create a ticket and one of our support consultants will come back to you.