Cannot transfer large files by FTP

[troy]

I have BestSync setup to synchronize a large number of files by FTP, but it is having problems with very large files (greater than 10 MB). Part of the file will transfer successfully, but the rest of it will not.

From what I can tell, BestSync tries to send these large files in pieces. It will send the first part, and then try to append the rest of the file in a second transfer. However, from what I can tell, the FTP commands used by BestSync do not follow FTP standards. When using REST to restart a file transfer, STOR should be used to continue the file, not APPE to append. Either APPE can be used on its own, or REST and STOR can be used together, but REST and APPE are not to be used together. Please see the second answer on this page for more info: http://stackoverflow.com/questions/2536 ... nd-command

Please let me know how I can get around this, or when you will have an updated version of BestSync that addresses this issue.

Here is some information about my server, BestSync installation, and the file.
Serv-U Version 15.1.0.480
BestSync 2015 Ver10.0.2.9 Ultimate License
File: gga_er_2015-06-28_f0000.txt
Size: 13,515,163 bytes

Here is an excerpt from my Serv-U log:
PASV
227 Entering Passive Mode (192,168,10,37,250,3)
STOR /[pathname changed]/gga_er_2015-06-28_f0000.txt
Receiving file "D:\[pathname changed]\gga_er_2015-06-28_f0000.txt"
150 Opening BINARY mode data connection for gga_er_2015-06-28_f0000.txt.
Received file "D:\[pathname changed]\gga_er_2015-06-28_f0000.txt" successfully (75.77 KB/sec - 7,864,320 Bytes)
226 Transfer complete. 7,864,320 bytes transferred. 75.77 KB/sec.
XMD5 "/[pathname changed]/gga_er_2015-06-28_f0000.txt";0;15662725
250 0255D970E83646631EF52719FFBF3A20
PASV
227 Entering Passive Mode (192,168,10,37,250,4)
REST 7864320
350 Restarting at 7,864,320. Send STORE or RETRIEVE.
APPE /[pathname changed]/gga_er_2015-06-28_f0000.txt
550 Cannot RESTart at any position while APPEnding to a file.

[RiseFly]

This issue has been fixed, the cause of the problem is that Serv-U FTP server only supports the STOR command after the REST command.