|FLATLAND and Architectural Desktop get along well enough but there is some overlap between the two applications. In some cases, the overlap does cause strange things to happen. The best example is that both applications have a function simply called Door. When both FLATLAND and ADT are loaded, the function that your going to get is the one parented by the application which appears first in AutoCAD's Support File Search Path.
This works to our advantage, and by understanding the Support File Search Path and establishing some User Profiles, you can setup a workstation to easily toggle back and forth between FLATLAND and ADT.
Here's the deal:
When AutoCAD opens a drawing, it automatically loads the FLATLAND menu and also the FLATLAND.mnl.
When the MNL file loads, functions run automatically to setup the proper environment for FLATLAND. They're important.
A good example of where you might run into this problem is when switching menus. If you load the FLATLAND menu from AutoCAD's command line, the MNL is loaded but setup is not automatically run. Again...this causes trouble for FLATLAND.
So here's the easy fix: Shut AutoCAD down and restart it. Things should work after that. If not, call, email or file a bug report and we'll fix you up.