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My final implementation is just to add the lockfile to the shortcuts that launch the daemons from the desktop (of startup folder). I implemented a log and lockfile external to the program: Shortcut target: C:\my_path\Databases\Code\database_daemon.bat name 2>&1 | wtee "..\logs\name_%date:/=...

Thanks for your patience with me. I was thinking about testing the existence of the lock file and not fact that it is locked. I did not initially understand how Jed's script and how the lock disappears when the process locking it ends.

Thanks guys.

Mike

Setx does not allow setting in the volatile environment under HKCU, so I am doing it manually: @echo off C: chdir C:\where\I\am\going IF "%1"=="" ( Set "myvar=default" ) ELSE ( Set "myvar=%1" ) REM Create a key in the volatile area of the current user registry...

Thanks for the reply. It looks like the process list does not show %1 and shows my scripts not my their bat name but by cmd.exe (even though I see the bat name in the GUI version). I was trying to avoid lock files because my IT department will do a patch requiring a reboot a couple times a month and...

Edit: I found a neat implementation, see below. Does anyone know how to have a .bat scipt check if another version of itself (%0) is running with the same %1 I have several database deamons running and I've had mysterious data corruption issues which I was able to trace to an extra instance running...