On Tue, Jan 5, 2021 at 3:30 PM wkitty42--- via fpc-pascal <fpc-pascal at lists.freepascal.org> wrote: > provided the other program opens the file for creation properly (eg: > blahDenyAll), right? Maybe use fmShareExclusive when opening the file. That name suggest you can only open if you are the only one? -- Bart