Glad you're finding the workflow useful! The workflow assumes that you have:
1. a polygon feature class of floor outlines
2. a polyline feature class of internal floor plan lines (walls, doors, etc.)
3. a polygon feature class of rooms.
Each feature in the first feature class is covered with a 'lattice' of polyline features, and then unwanted features are cut out using the last two feature classes; the user selects which floor plan line and room features should not have network features crossing them. The tools we've created thus far require all three feature classes, and they need to have the attributes listed in the workflow documentation. However, for the last two feature classes, it should be possible to use an empty feature class for either or both of them if you don't have such data available.
What kind of data does your building layer include? Is it a feature class or shapefile? Is it polygon, polyline?
