There’s an interesting topic on the FoxForum Wiki on a phenomenon that happens with large tables (close to two gigabytes when records are locked. “HighRangeLockingBug. There is apparently a problem with VFP’s locking scheme, at least on Windows XP. I’ve always thought that VFP locked at (2GB + record number), which was one of the reasons that tables are limited to 2GB. This is wrong. VFP doesn’t lock at… ” from FoxForum Wiki