Under certain conditions, spaces are automatically created during project upgrade when a project that was created in a previous version of Revit is opened.
Space creation during project upgrade preserves MEP data previously maintained in room components. It creates spaces based on the existing rooms, converts room tags to space tags, and converts room schedules to space schedules. This is the only time when spaces can be automatically created.
Automatic space creation also occurs if any of the following conditions is satisfied during Project Upgrade:
Spaces that are automatically created (based on rooms) during project upgrade are created as occupied. (Occupiable property parameter selected).
All rooms, except for copy/monitored rooms, are retained in the project and coexist with the new spaces (copy/monitored rooms are removed). Rooms in the project retain the room properties.
Room tags that display MEP properties are recreated as MEP space tags. Space tags include room information only if they need to match the data displayed in previous Revit versions.
Room schedules that contain MEP properties are recreated as MEP space schedules. Space schedules include room information if they need to match the data displayed in previous Revit versions.
Room color schemes that are mapped to MEP parameters are recreated as color schemes mapped to equivalent space parameters.