I am using the latest version on VMSpc 2.3 complete install, not the upgrade. Everytime that computer goes to sleep and wakes up, it fails to find the serial port. I must quit VMSpc and restart. Here lies the problem. When VMSpc restarts, I lose my trip data. Sometimes it resets from the time I restarted it and most of the time it looks like it resets itself when it first went to sleep. This has also caused me to lose my configuration as well. I have since copied my configuration file to another directory for when this occurs. My screen will go back to default and my configuration file becomes unreadable. I then need to copy back my original config file to the VMS directory. This too has happened several times since upgrading to 2.3.