Is there a way to copy “busy” files from a network SMB share?

I am trying to copy files from the network share of a Windows 11 Pro host to another host. My MacBook Pro throws up this error alert in the Finder:


rclone running on a NAS says: “Failed to copy: failed to open source object: failed to open: open v23\data01\accounting\SYSTEM SETUP.adt: response error: A file cannot be opened because the share access flags are incompatible.”

The file in question is part of the storage of a database used by a law practice management application. Presumably the management server has the file open. My question is, whether the file could be copied anyway, with proper configuration of the share.

I am about to see, what this looks like when the destination is another Windows machine and the copy operation is running on the destination. I will post my results in a response.

In Windows the files copy without issue (so far, at least):



But then:



I think, I have to give up on this. If a file is being written to, it makes sense that it would not be able to be copied, unless the file system has file-level snapshots, and the copy operation access the snapshot of the file from when it was last closed.

Instead, I will limit the copy operation to night time, when everyone has gone home.