Hi Andy,
you make my day ;o)
The error was before the "nano" :o))
I had probably callibrated correctly, but was of the opinion DONE = Done, saved. I wondered why the Save window would appear again and again.
I confess, I didn't have time to read the manual yet, or was I of the opinion, as an experienced VNA user I wouldn't have to... the next mistake ...
But I promise to read the fine manual tonight (rtfm)
73 and thanks again for your help
Joe
