Delphi app is vanishing in Windows NT


I have this strange occurrence of my Delphi app disappearing now and again.
I'm using Delphi 3 and running in NT Workstation. MS SQL is my back end. The
disappearance is completely random. There are no error messages. The one
second the app is running along and the next second its gone (shazam! will
be in order here).

I suspect that there is some memory leaking going on, which may be
responsible for the strange behavior. I'm also making use of the TreeView
component exstensively for data display purposes.

Any ideas / suggestions ?