Why should thisnever happen with Session.SynchronizeDirector

Howdy,
So I am using the .net Assembly for a windows service that synchronizes a folder on the FTP server with a folder on the file share server. I found how to do this here: https://winscp.net/eng/docs/library_session_synchronizedirectories

Near the bottom of the sample code is the following:


I don't understand the comment // This should never happen with Session.SynchronizeDirectories.
Could someone explain to me why this should never happen. It currently happens with my service and I am not sure why it shouldn't.

Thanks for your help!

Well, it can actually happen, when the server does not support changing remote file timestamp. But that makes the synchronization impossible.

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

Attached is a log.

I don't know if this is related but the datetime of the file at the end of the process is 4 hours earlier than the current time at the beginning.

If I create a file at 4:00P and then use this program to ftp it, when it ends up in the destination folder, the datetime on the file is 12:00P. If I look at the properties, it says:
created: 30 minutes ago
modified: 5 hours ago
accessed: 30 minutes ago
(see attached jpg)

Thanks for your help
Nat

You are using "remote to local" synchronization (The .Touch will always be null).

While the example is for "local to remote" synchronization.

I have updated the comment to "This should never happen during "local to remote" synchronization"

Many thanks!!

We'll just live with the weird time differences for now.

codenat wrote:

We'll just live with the weird time differences for now.

Not sure how this statement relates.

martin wrote:

codenat wrote:

We'll just live with the weird time differences for now.

Not sure how this statement relates.

codenat wrote:

I don't know if this is related but the datetime of the file at the end of the process is 4 hours earlier than the current time at the beginning.

If I create a file at 4:00P and then use this program to ftp it, when it ends up in the destination folder, the datetime on the file is 12:00P. If I look at the properties, it says:
created: 30 minutes ago
modified: 5 hours ago
accessed: 30 minutes ago
(see attached jpg)

the attached jpg is in above post

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

test

martin wrote:

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

To generate log file, set Session.SessionLogPath. 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.

A log was already attached above along with the jpg mentioned that you were asking about.

If I create a file at 4:00P and then use this program to ftp it, when it ends up in the destination folder, the datetime on the file is 12:00P.

Do you refer to upload or download? I assume that download, as you do not seem to upload at all.
Can you attach a log file showing two consecutive synchronizations, where at least the first synchronization actually downloads some file (with wrong timestamp) and the second synchronization either downloads the same file or determines that the file does not need synchronization? Please mention a name of the file I should look for in the log file.