version mismatch error WinSCPnet.DLL (



version mismatch error WinSCPnet.DLL (


We have been using WinSCP version since past 1 year and it has worked fine all this while. Suddenly, it has started to report intermittent errors as below

winscp.exe () does not match version of this assembly WinSCPnet.DLL (

We haven't changed anything in the code. We also have another application using WinSCP.exe and it is also referencing the same version. Both these applications have been working fine up until last 2-3 weeks.

As mentioned, it is intermittent and doesnot occur frequently. some of the info as suggested in the guidelines are here:

Version of WinSCP you are using
Exe Version
Major Minor Build Revision
----- ----- ----- --------
5 9 1 6885

Dll version
Major Minor Build Revision
----- ----- ----- --------
1 3 4 6885

If the problem started to occur after upgrade, mention the last version of WinSCP which was working for you
No upgrades performed what so any

Version of Microsoft Windows you are running WinSCP on
Windows Server 2008

Transfer protocol (SFTP, FTP, SCP or WebDAV)

Mention if you use GUI or scripting/automation. If you use GUI, specify interface style you are using (Commander or Explorer)

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Site Admin
martin avatar
Prague, Czechia

Re: version mismatch error WinSCPnet.DLL (

Please attach a full debug log file showing the problem (using the latest version of WinSCP).

To generate the debug log file, set Session.DebugLogPath. Submit the log with your post as an attachment. You may want to remove data you consider sensitive, such as host names, IP addresses, account names or file names (unless they are relevant to the problem). If you do not want to post the log publicly, you can mark the attachment as private.

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