GamecockStudent:
My first guess would be the same as Peter's, but then follow s2art's advice and check the Model View Options > Options for Construction Elements, for doors there is a "Hide on Floor Plan" option which replaces the doors with solid wall, no opening is shown at all.
You should add a Signature to your Profile (click the Profile button near the top of this page) with your ArchiCAD version and operating system (see mine for an example) for more accurate help in this forum.
David