To the bug reporter, can you test the following. 1) test again, but without the vfs objects = full_audit. There are some known bugs in the vfs objects, i can find the exact one but try it please. Does that help? if not, step 2. ( ! again please test without the vfs_full_audit. ) (based on https://bugzilla.samba.org/show_bug.cgi?id=11114 ) 2) open the file with the unc path \\servername\share\... etc.. and try again with \\ipnumber\share\... etc. optional test: you can use "net use driveletter.. \\servername\share and "net use driveletter.. \\IPnumber\share based on : https://bugzilla.samba.org/show_bug.cgi?id=8722#c8 but current bugreport does not tell which windows version is used. 3) ms did make some changes also, but this is over my head. So have a look at what they write at libreoffice about a similar locking problem. https://bugs.documentfoundation.org/show_bug.cgi?id=67534 @mattie last, i found these bug fixes in 4.3 which are locking related, but again, a developer should read that. https://bugzilla.samba.org/show_bug.cgi?id=12139 https://bugzilla.samba.org/show_bug.cgi?id=11400 https://bugzilla.samba.org/show_bug.cgi?id=11549 I found a port of samba and for recital and foxpro, https://www.recitalsoftware.com/blogs/205-howto-configure-samba-for-recital-and-foxpro and very last, you can try i narrow down the problem and test with some windows paramter changes. read : https://support.microsoft.com/en-us/help/296264/configuring-opportunistic-locking-in-windows I hope this helps a bit in finding the source problem. Greetz, Louis
