SFTP problem

[Yearling]

I tried connecting to SFTP (see attached image with configuration), but the connection failed (see log). The same configuration (without password) with the same certificat works in the WinSCP SFTP client (winscp.net/eng/). Where could the problem be?


2025-12-09 23:20:21 Codepage not set. Will try to auto-detect if UTF-8 is supported
2025-12-09 23:20:21 No text format conversions  will be done for text file transfers
2025-12-09 23:20:21 Connecting to sftp._______.cz:1222
2025-12-09 23:20:21 Connected
2025-12-09 23:20:22 Key exchange method : diffie-hellman-group-exchange-sha256
2025-12-09 23:20:22 Host key method : rsa-sha2-512
2025-12-09 23:20:22 Encryption method (both directions) : aes256-ctr
2025-12-09 23:20:22 MAC (message authentication code) method (both directions) : hmac-sha2-256
2025-12-09 23:20:22 Compression method (both directions) : none
2025-12-09 23:20:22 Fingerprint : 3E 0D 34 8A 0F 28 BD 24 8A FA F1 4E E3 03 18 F4
2025-12-09 23:20:22 Failed - Session not connected

[Mathias (Author)]

if you do not check the "Do not verify keyfiles" it will verify them..

If you upgrade to latest beta it will log move what is happening.

Might be that the keyfile format is not support. I know that the format it supports is the one that PuttyGen generates

[Yearling]

I am using version Multi Commander v15.6 (Build 3119) (64 bit). Is there any newer beta version (where)?

[Mathias (Author)]

That is latest Release,, In Core settings you enable you update to beta versions..

[Yearling]

OK, I have last beta version 64bit v.15.7 build 3123. Certificat (both) was generated by PUTTYgen, but results are the same as yesterday
I have tested both "Do not verify key file" checked and unchecked.
I have tested two certificates (first without password, second with password) - both in WinSCP SFTP client work flawlessly but in Multi Commander not :-(
There are log files in attachment - two from Multi Commnader (for both certificates) and one from WinSCP client for comparision.

2025-12-10 18:59:23 Windows Linebreak are used for text file transfers
2025-12-10 18:59:23 Connecting to sftp.______.cz:1222
2025-12-10 18:59:23 Connected
2025-12-10 18:59:24 Key exchange method : diffie-hellman-group-exchange-sha256
2025-12-10 18:59:24 Host key method : rsa-sha2-512
2025-12-10 18:59:24 Encryption method (both directions) : aes256-ctr
2025-12-10 18:59:24 MAC (message authentication code) method (both directions) : hmac-sha2-256
2025-12-10 18:59:24 Compression method (both directions) : none
2025-12-10 18:59:24 Fingerprint : 3E 0D 34 8A 0F 28 BD 24 8A FA F1 4E E3 03 18 F4
2025-12-10 18:59:24 Failed - Session not connected
2025-12-10 18:59:24 Disconnecting...
2025-12-10 18:59:24 Closing Session...
2025-12-10 18:59:25 Session closed