"No supported authentication methods" when saving file

WinSCP works great for connecting and transferring files to an EC2 Instance. I can both upload and download without problem. The problem occurs if I try to right click a file in the EC2 instance and edit it without transferring it down. The file opens, but I get the error when I try to save it. Tried both PSPad and the Internal Editor, both have the same problem.

The error does say "Unable to use key file ("C:\users......\tmp5AC9.tmp" (unable to open file) so perhaps the "save" process is trying to access a key the main session has locked?

Running on Windows 7, and SCP 5.7 (Build 5125)

But the "C:\users......\tmp5AC9.tmp" does not look like a path to a key. Or is it?

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

martin wrote:

But the "C:\users......\tmp5AC9.tmp" does not look like a path to a key. Or is it?

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

As you note, I do not believe that tmp file is a key, and I am not clear why it is using such. I can upload a file without problem, so I assume keys are working, but when I EDIT a file and try to save it fails.

I am launching SCP through Visual Studio, which is feeding the key information to SCP. I tried overwriting the file by uploading twice, which worked. Don't know why SCP is trying a different authentication when saving then when copying...

Thanks again for your help! It's not critical, but I like things to work, and hope I am helping.

stivostenberg wrote:

I am launching SCP through Visual Studio, which is feeding the key information to SCP. I tried overwriting the file by uploading twice, which worked. Don't know why SCP is trying a different authentication when saving then when copying...

How is VS feeding key information to WinSCP?

WinSCP is run like:
"C:\Program Files (x86)\WinSCP\WinSCP.exe" scp://XXXXXX /privatekey="C:\Users\s.ostenberg\AppData\Local\Temp\tmp66F4.tmp"

I assume the temporary file disappears before you try to save the file.