Welcome to the forum.
You should post your specs in your signature (see mine) as many answers depend on which version of ArchiCAD you are running or sometimes your operating system.
Meanwhile...
Check to see if the doors and windows are on the correct story.
Check to see if the settings for your view have the doors and windows turned off.
Erich
AC 19 6006 & AC 20
Mac OS 10.11.5
15" Retina MacBook Pro 2.6
27" iMac Retina 5K