Posted: 2014-12-30 19:04
Hi there, I am receiving this message when trying to connect to a server via SFTP:
Unable to use key file "?C:\Services\PrivateSSHKeyNP.ppk" (unable to open file) Using username "myuser". Authentication failed.
SessionOptions sessionOptions = new SessionOptions
Protocol = Protocol.Sftp,
HostName = "someserver.com",
PortNumber = 22,
UserName = "myuser",
SshHostKeyFingerprint = <host fingerprint>,
SshPrivateKeyPath = "C:\Services\PrivateSSHKeyNP.ppk"
The key file was made with PuttyGen and I can use your client application and a different FTP client to connect using this Private Key file.
The Private Key file has no password.
What am I doing wrong?
Posted: 2014-12-30 19:56
By the way, I am using the latest version - just got it from NuGet yesterday
Location: Prague, Czechia
Your string syntax is wrong. You have to escape the backslashes. Either use
If this does not help, please attach a full session log file showing the problem (using the latest version of WinSCP).
To generate log file, set
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