how to solve runtime problems

Hello,

I'm using WinSCP 3.8.2 (330) for synchronizing a remote folder (OUT) with a local folder by sftp using a script-file. Synchronization starts with a batch-file:
>cd C:\Programme\WinSCP3
>winscp3.com /script=eccescript.txt

The script-file eccescript.txt contains:
>option batch on
>option confirm off
>option transfer binary
>open sftp://farbglanz:dfosi39df@pts1.photo2lab.net:22
>synchronize local X:\SFTP /OUT
>mv OUT/*.* OUT.done/*.*
>exit

After download the synchronized files (in a second step) are moved from OUT into OUT.done. All of this works perfectly in a static mode.
But what if during the download another file is uploaded by a second user. This file will not be downloaded, because at the beginning of the synchronize-command this file was not yet present. But in the second step it will be moved into the folder OUT.done together with the other files even if it wasn't yet downloaded.
How can I circumvent this problem?

Probably my bad english is not easy to understand! (I'd like to apologize!) I will try to explain it one more time and I hope in a more evident way:

The script works correctly. But what will happen if during the execution of the script a second user uploads another file/directory. I think it will not be downloaded, but it will be moved.
I would like to move only the files that I already downloaded.How can I realize this?

Thanks for your patience!

You can move the files first and synchronize against the OUT.done.