I'm pretty sure I create walls. I created a polygon and used the "Create Room" function from the event planning section menu. In training we did this via the extrude tool (I believe). To be sure, if you could tell me how to check if I actually created WALLS...that's be great.
I did not have the insertion Mode activated. I did that.
The doors DO NOT seem to insert correctly i.e. the wall line is still visible where the door is supposed to be inserted.