The screencast confirms that, doesn't it? The one-time password seems to really work just one time. What if you use new one-time password for the second prompt?

Maybe you can take a look at this attachment.

You wrote that saving works for some time. But I do not see that in the log. It is failing from the very first save. So how is it? It looks like you are actually not able to use your one-time-password second time for the background session.

Sorry for the late reply. Here is the log file.

Thanks you get an OTP prompt for the first save is expected, as edited files are uploaded using a separate connection. For the "No supported authentication methods available" problem, please post session log file.

Hi,

I am experiencing an issue when using WinSCP with a server that requires a password and a verification code for authentication.

Steps to reproduce:

• Connect to the server using WinSCP.
  
• Enter the password and verification code.
  
• Login succeeds.
  
• Open a remote file and edit it (tested with both the internal editor and an external editor).
  
• Save the file.
  

At this point, WinSCP prompts for the verification code again. If I continue editing and saving files within a short period of time, eventually the connection fails with:

No supported authentication methods available