Thomas,
PDMFJI, probably:

https://stackoverflow.com/questions/59198912/chilkat-sftp-authentication-failed-or-partial-success

... It probably means the server requires both the private key and a password. You would want to call AuthenticatePwPk instead. ....


>And again, it does not work. I generated, as written before, a key-pair with Chilkat and tried the following eyample from the Chilkat-example-page:
>( The keys generated work well when I use filezilla to check them)
>
>

>* This example assumes the Chilkat API to have been previously unlocked.
>* See Global Unlock Sample for sample code.
>
>loSftp = CreateObject('Chilkat_9_5_0.SFtp')
>
>* Load a .ppk PuTTY private key.
>loPuttyKey = CreateObject('Chilkat_9_5_0.SshKey')
>lcPpkText = loPuttyKey.LoadText("d:\ssh2\chilkat_rsa_priv.ppk")
>
>* "secret" is the actual password for the above PPK.
>loPuttyKey.Password = "Muehlematt"
>lnSuccess = loPuttyKey.FromPuttyPrivateKey(lcPpkText)
>IF (lnSuccess <> 1) THEN
>    ? loPuttyKey.LastErrorText
>    RELEASE loSftp
>    RELEASE loPuttyKey
>    CANCEL
>ENDIF
>
>lcSshHostname = "sftp.clnet.bpm.ch"
>lnSshPort = 22
>SET STEP ON
>* Connect to an SSH/SFTP server
>lnSuccess = loSftp.Connect(lcSshHostname,lnSshPort)
>IF (lnSuccess <> 1) THEN
>    ? loSftp.LastErrorText
>    loSFTP.Disconnect()
>    RELEASE loSftp
>    RELEASE loPuttyKey
>    CANCEL
>ENDIF
>* Authenticate with the SSH server using a username + private key.
>* (The private key serves as the password.  The username identifies
>* the SSH user account on the server.)
>lnSuccess = loSftp.AuthenticatePk("ediholste",loPuttyKey)
>IF (lnSuccess <> 1) THEN
>    ? loSftp.LastErrorText
>    loSFTP.Disconnect()
>    RELEASE loSftp
>    RELEASE loPuttyKey
>    CANCEL
>ENDIF
>
>? "OK, the connection and authentication with the SSH server is completed."
>
>* This example is only to show the connection + authentication using a PuTTY private key...
>loSFTP.Disconnect()
>RELEASE loSftp
>RELEASE loPuttyKey
>

>
>And the lasterortext is:
>ChilkatLog:
> AuthenticatePk:
> DllDate: Mar 19 2019
> ChilkatVersion: 9.5.0.77
> UnlockPrefix: HOLSTE.CB1042020
> Architecture: Little Endian; 32-bit
> Language: ActiveX
> VerboseLogging: 0
> Component successfully unlocked using purchased unlock code.
> login: ediholste
> idleTimeoutMs: 30000
> sshAuthenticatePk:
> keyFingerprint: ssh-rsa 2048 0f:9b:22:77:28:f1:75:3d:ad:ee:07:29:0e:33:ea:12
> requestUserAuthService:
> sendServiceRequest:
> svcName: ssh-userauth
> SentServiceReq: ssh-userauth
> --sendServiceRequest
> ssh-userauth service accepted.
> --requestUserAuthService
> Using an RSA key.
> Sent public-key request.
> AuthList: publickey,password
> rsaSigLen: 256
> Sent public-key request with signature.
> Authentication failed or partial success. (4)
> PartialSuccess4: 0
> AuthList: publickey,password
> Publickey authentication failed..
> --sshAuthenticatePk
> Failed.
> --AuthenticatePk
>--ChilkatLog
>
>I am starting to look for some other component ti use...
>
>Best regards
>
>Thomas