Hello Terry.

It pains me to ask two questions when I prefer to manage the situatation such that I ask none, or at the most, one!

Really? why is that? I thought that the only stupid question was the one that you didn't ask < s >. (Not you personally, of course.)

On thing that maybe different is that the forms in the project are "In Top Level Form" inside a "Top Level Form", and the names are public.

Why are you using public variables? Why not just use a form manager object that tracks the open forms with a collection property?

The issue arises when the main form is X-CLosed, and the housekeeping code checks for (and subsequently closes) any open (TYPE="O") "contained" forms.

Hmmm. Difficult for me to comment on what is going on without seeing the code < s >...