Offline Client - Attached files Sync Error

[bidoka]

I have a problem with attached files to notes on Opportunities when I syncro to our SugarCRM Pro server.

Detailed Error:
I had attached several files on to several notes of different opportunities at my SugarCRM Off Line Client. I can see them on my off line client.
When other user of the same team, synchronize and looks at the opportunities notes attached file at his off line client it says: "get online to see the file".
When I or the other user go online, we can see the link to the attached file on the Notes List under Activities. But, when we click on that link a screen saying "Invalid Reference File" appears.

After looking for a solution at the support forums...
I check the permission on the upload folder, and they are ok.
At the config.php at the server we have:
'upload_dir' => 'cache/upload/',
'upload_maxsize' => 12000000,

At the /etc/php.ini
; Maximum allowed size for uploaded files.
upload_max_filesize = 128M

I didn't found a solution for this error.
Please, if you can help me, I will appreciate it a lot.

[Angel]

The error you reference would seem to indicate that the file does not exist on the filesystem.

To verify, note the ID value of the Notes record and then look in your <sugar root>/cache/upload folder for your installation and confirm that said folder contains a file with a name that matches the ID value of the corresponding Notes entry.

[bidoka]

Thanks Angel,
The ID Value doesn't appear on <sugar root>/cache/upload folder.
If I attach a file to a Opportunity note in the Sever (On line mode), the ID Value appears and everybody can see it.

I do know why the attached files to Opportunity Notes on the Offline client doesn't sync to the SugarCRM Server.
Any idea?

[Angel]

I believe this is a limitation of synchronization, in that it doesn't sync files. Much like you are required to logon to the server to view linked files that are referenced in your Offline install, but originated on the server.

Seems like your system is behaving correctly.