I have separation system and I do not want people to see the data file so its opening script uses 

 

Adjust Window[hide]

 

I even tried running it as subscript from the interface file but the data file still shows in the menu bar under Windows.  How can I keep it from showing at all?  Ideas appreciated.

Hidden, afaik, does not remove the file from the Windows menu. However, what I typically do is create a layout on the data file based on a table with no fields in it (startup). Then, just put text on that layout, "This is a supporting file. Open the main file to use the solution." Lock the data file down by hiding and locking the toolbar.

Another option is to create a new EMPTY custom menu set which removes the Windows from the menu bar.

Yes, I see I should use custom menu to remove all actions if in data file but it still does not stop it showing in windows in the main file unfortunately.  Thank you both for helping me with it.

My apology, Rob, I was not very clear - kinda pressed today.    I mixed two concepts ... the data file, in addition to Barbara's suggestions, should also have default an empty custom menu so NO actions are available as well as locking down with security but mostly, the UI should have the windows option removed from all custom menus except the developer's menu which will hide the temptation for users to click onto the data file from Windows menu item.

Thank you both for answering.   I decided to do both, put the message and hide the window option from all menus in the UI.