WinSCP.SessionRemoteException:Connection has been unexpected

We are using WinSCP.dll in C#.net to download files from sFTP server.


We have multiple calls to the sFTP for downloading the files.
Frequency duration for sFTP call is 10 seconds.
Due to high call frequencies we are getting below error:


Please suggest if you have any information.

Not sure what information you want. It's your server that denies you the access. You should know why. If not, please inspect the server's log.

martin wrote:

Not sure what information you want. It's your server that denies you the access. You should know why. If not, please inspect the server's log.

If we reduce the sFTP call frequency to 2 minutes instead of 10 seconds than we are not getting this error frequently.

Due to multiple sessions in short timespan is causing this issue.