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Sorry, I've misunderstood your original post.
Can you attach a log file from a machine, where it works?
Can you also attach a download log file from the machine, where upload does not work?

Sorry, is that the one you need ?

Both logs are the same (script). Please try to upload the GUI log again.

This is the log file.

THe same if I try to upload manually with winscp

Re: Connection and Download ok. upload ko with Server sent passive reply with unroutable address

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

To generate the session log file, use /log=path_to_log_file command-line argument. 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.

Connection and Download ok. upload ko with Server sent passive reply with unroutable address


I have one Windows 2012 server with FTPs. I have several PC with winscp.exe sending files to the server every day.
For one of this PC, the transfert fails with the message :

Server sent passive reply with unroutable address. using host address instead.

The same folder with same script and winscp version is copied on all PCs, only one doesn't work.

On the problematic PC, I can manually connect and download file from the server, but the upload always fail with same message. I can browse the folder too without problem.
I saw a previous installation of winscp on this PC, and deleted it.

I desactivated the firewall, verified that winscp was in passive mode, checked the certificat, I don't have any other idea.

Thanks for your help, I don't know where to look for.