FTP File Sync Error [notifyUnbufferedRead]

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dax

I try to FTP to sync to my FTP Server and I get an error message
My FFS version is 11.27
Need Help Thanks~
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Zenju

Which FTP server is this, and what is the real size of the file in question?
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dax

Hi
File Size 7.25KB
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Still confirming the ftp server environment
Thanks !
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Zenju

It looks like the file content was changed outside of FreeFileSync during the FTP file upload, thous the error message.
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dax

How should I solve this problem? Thanks!
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Zenju

Make sure that the source file content does not change outside of FreeFileSync during the FTP file upload.
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dax

I tried using a different software to connect to the ftp server and the file is showing a different size than FFS, any good suggestions? thanks!
FFS File Size
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Dos Command
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Mobaxterm
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Zenju

Okay, so you're in an FTP download case and FFS somehow gets an incorrect listing with file sizes of 0. How can that be?

What does the FTP server return to the "FEAT" response? (test e.g. with FileZilla)
Do you have a test access to this server that I could use for testing?
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dax

Hi
"FEAT" response as below and thanks!
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Zenju

Okay, so I suspect there is an issue with the MLST/MLSD response.

What responses do you get from the server for:
MLST /QCI/H48B7801.QCI
and
MLSD /QCI
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dax

Hi
MLSD /QCI
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Zenju

Can you test the QCI directory listing with the following FreeFileSync version?
https://www.mediafire.com/file/tmwg8ap6s9l2r3y/FreeFileSync_11.28_%255BBeta%255D_Windows_Setup%25285%2529.exe
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dax

Hi
the problem is still the same
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Zenju

Let's dig deeper. The following version will return an error message with debugging info, when the file "H48B7801.QCI" is found: https://www.mediafire.com/file/ooapjs1n5f150lg/FreeFileSync_11.28_%255BBeta%255D_Windows_Setup%25286%2529.exe
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dax

Hi FYI & Thanks!
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Zenju

The FTP server is returning incorrect information for "Size" and "Modify". This seems to be a bug in the FTP server software with regards to the "MLSD" command.

According to your previous test the response should be:
expected.PNG
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For a test comparable to what FreeFileSync is doing you could enter MLSD followed by a path:
MLSD /QCI
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dax

Hi FYI & Thanks!
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Zenju

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dax

Sorry!What does this mean?
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Zenju

Enter "PASV", just as you did in viewtopic.php?t=9720&p=35793#p35751
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SJH

Hi dax:

any update? I have this problem too .
TSMC ftp ........ >_<

Thanks
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Zenju

=> FTP server bug: viewtopic.php?t=9720#p35759
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dax

Hi dax:

any update? I have this problem too .
TSMC ftp ........ >_<

Thanks SJH, 02 Nov 2022, 12:27
Google translate: It seems that neither side thinks it is their own problem @@
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SJH

Hi Dax:

Downgrade to 10.10 , it seems to work fine (TSMC)
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dax

Hi Dax:

Downgrade to 10.10 , it seems to work fine (TSMC) SJH, 02 Nov 2022, 13:23
Hi SJH
It is working! Thanks a lot!