I hope you will try again. I'd like to know that it is working. My station won't be on the air this coming Wed. as I'm out of town for the week.

I have the same problem. The log files are in the default location "C:/Program files (x86)/VarAC_qso_log.adi". Unlike Mark I did the upgrade with the windows installer.

I found the problem. I had an intermittent USB cable.

It happened when using the right-click menu, however it seems to be working normally for the last week. I currently have version 3.6.6 and have not had it happen in this version.

I'm using version 3.5. It does not happen every time.