"Aborted" in log...source?

[ebmudder]

Hi All: I have a client trying to upload a file via SFTP and they're unable to complete...the log snippet below shows the transaction. When I see "Aborted" in the log (second line from bottom), what is the source of that? Is it CoreFTP aborting the transfer, or the client? And what would cause that to happen?

If it's not CoreFTP aborting the transfer, where would I look next to establish the cause? They are able to upload smaller files without issue, and they're able to upload the file (and much larger files) manually using a desktop client from a different IP address.

I'm not restricting anything in CoreFTP in the "user1" configuration. I do use IP restrictions on a network firewall between the server and the internet, but there are no connection limits or filtering of any kind on the firewall either.

[20250514 12:33:40] [XXX.XXX.XXX.XXX] [user1] user 'user1' sent
[20250514 12:33:40] [XXX.XXX.XXX.XXX] [user1] USER-PASS success
[20250514 12:33:40] [XXX.XXX.XXX.XXX] [user1] user (user1) granted access
[20250514 12:33:41] [XXX.XXX.XXX.XXX] [user1] path requested - '.'
[20250514 12:33:41] [XXX.XXX.XXX.XXX] [user1] path returned - /
[20250514 12:33:41] [XXX.XXX.XXX.XXX] [user1] path requested - '/In'
[20250514 12:33:41] [XXX.XXX.XXX.XXX] [user1] path returned - /In/
[20250514 12:33:41] [XXX.XXX.XXX.XXX] [user1] LIST success - /In/
[20250514 12:33:41] [XXX.XXX.XXX.XXX] [user1] path requested - '/In/testfile1.csv'
[20250514 12:33:41] [XXX.XXX.XXX.XXX] No such file or directory - D:\ftpRoot\folder1\In\testfile1.csv
[20250514 12:33:41] [XXX.XXX.XXX.XXX] [user1] path requested - '/In'
[20250514 12:33:41] [XXX.XXX.XXX.XXX] [user1] path returned - /In/
[20250514 12:33:41] [XXX.XXX.XXX.XXX] [user1] Upload of 'D:\ftpRoot\folder1\In\testfile1.csv'
[20250514 12:34:41] [XXX.XXX.XXX.XXX] [user1] Aborted D:\ftpRoot\folder1\In\testfile1.csv, transferred 38194743 bytes, file size = 38194743
[20250514 12:34:41] [XXX.XXX.XXX.XXX] [user1] disconnected (user1)

[ForumAdmin]

It looks like the client may have aborted the transfer as a disconnection was likely the reason for the abort of the transfer by Core FTP Server.

Would check the client for any potential error messages that may help diagnose the issue.