VShell resume/reput fail - locked file

[zybex]

Hi,
I'm using VShell v3.9 SFTP server. When trying to resume a transfer with Reput command after a connection drop, the server replies with:
'The process cannot access the file because it is being used by another process. '

The file remains locked for a long time, even disconnecting/reconnecting doesn't help. Eventually it unlocks and the resume works.

Is there a way to adjust the lock timeout on the server settings?

This only happens when there is a client connection loss (like wifi signal loss or sudden internet connection failure), so the TCP connection probably remains up for some time on the server side.

Thanks!