开云体育

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.

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.

Good day Ken.
Thanks for the reply.
Running the NanoVna saver software.exe, does not even start up to the real measuring screen.
The .exe runs in the system prompt area for a while and then just disappears after an error is detected.

A kluge way to see/capture the quickly disappearing screen...

If you have a smart phone with camera capable of taking video, start a video recording of your nanoVNA screen during start up. Stop video after the screen goes blank. You should be able to scroll back through the video to a still frame of the screen display.

John, wa3jrs

John. Great idea.
I will try with my smart phone.
I am also going to try and do a screen p

On Thu, Feb 11, 2021 at 02:46 PM, daniebjoubert wrote:

John. Great idea.
I will try with my smart phone.
I am also going to try and do a screen p

Hi John,
Attached the screen print before it disappears.
I am grateful for the assistance.
Danie ZS1DBJ

Hi,

It is a long time ago now that you experienced a startup error of NanoVnaSaver.
I do not know if it still actual for you, but recently I had the same startup problem with this application.
Normally the application does also startup without a NanoVna connected to your computer.
First I tried a newer version of this application. Same startup error.
In the promptscreen that you see on your picture made of that screen you see a line "Settings............./NanoVnaSaver.ini
If you delete that file (first copy this file to a temp folder as a back up) then a new ini file is made as soon as you restart the application NanoVnaSaver.exe
The application should startup the measurement screen now.

I hope this helps.
Kees, PE0CWK