WinSCP.SessionRemoteException: Credentials were not specified --- with invalid credentials :: Support Forum

charles
Joined:: 2024-07-04
Posts:: 2

WinSCP.SessionRemoteException: Credentials were not specified --- with invalid credentials

2024-07-04 00:26

Hi, I'm building a .Net Core console app using the NuGet WinSCP package, version 6.3.4.
When connecting to an FTPS server with bad credentials, I get this exception:

WinSCP.SessionRemoteException: Credentials were not specified.
   at WinSCP.SessionLogReader.Read(LogReadFlags flags)
   at WinSCP.ElementLogReader.Read(LogReadFlags flags)
   at WinSCP.SessionElementLogReader.Read(LogReadFlags flags)
   at WinSCP.CustomLogReader.TryWaitForNonEmptyElement(String localName, LogReadFlags flags)
   at WinSCP.CustomLogReader.WaitForNonEmptyElement(String localName, LogReadFlags flags)
   at WinSCP.CustomLogReader.WaitForNonEmptyElementAndCreateLogReader(String localName, LogReadFlags flags)
   at WinSCP.CustomLogReader.WaitForGroupAndCreateLogReader()
   at WinSCP.Session.WaitForGroup()
   at WinSCP.Session.Open(SessionOptions sessionOptions)

I was expecting an 'authorization failed' or 'invalid credentials' exception?
I proved the credentials are there by purposely changing the correct password by adding an invalid character to the correct password, getting the above exception, then removing the one extra character, and then connecting.
This is on Windows Server 2022, Visual Studio 2022.
Thanks.

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 41,041
Location:: Prague, Czechia

Re: WinSCP.SessionRemoteException: Credentials were not specified --- with invalid credentials

2024-07-04

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

To generate the session log file, set Session.SessionLogPath. Submit the log with your post as an attachment. Note that passwords and passphrases not stored in the log. You may want to remove other data you consider sensitive though, 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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