I have an SAA-2N and I occasionally have similar problems with NanoVNA-Saver. The software will detect the device on the appropriate COM port, but when you click on ¡®Connect to device¡¯, the program quickly exits.
A solution which has worked for me was to use VNA_QT.EXE software to establish a link to the NanoVNA. Once the device is connected in VNA_QT, the display screen on the NanoVNA switches from the normal Smith chart to a different screen showing the device is in USB Mode. As long as the screen displays USB Mode, I have always been able to close VNA_QT and switch over to NanoVNA-Saver and successfully connect to the device.
I hope this helps.
Ken, WB?OCV
From: daniebjoubert
Sent: Wednesday, February 10, 2021 08:40 AM
To:
[email protected]Subject: [nanovna-users] Start up error.
Good afternoon to the group.
I have been using NanoVna saver for more than 2 years and upgraded after each new version but left the old .exe files in a folder.
Suddenly, trying to run the .exe files I got an error during the start up prompt screen:: error problem with type - none type has no len.....
or something like that. The screen disappear so fast it is difficult to read error.
This happens with all the versions to my disposal.
Can anyone perhaps suggest a solution. Thank you in advance.
