So I've been trying to create a list of Schedule Keys that can be used in an outdoor air ventilation schedule. The schedule would list the Rooms, Square Footage, and then you would be able to choose an Occupancy Classification which would then associate an Occupancy Density from the Schedule Key. It works great, until you close the project and try to open it up the next day and it crashes before it can even open. I have tried recreating the Schedule Keys, and I have even created a whole new project but the same thing always happens. As soon as i save the project and close it, I try to re-open it and it will crash every time. I didn't even finish creating the Schedule, I just created the Schedule Keys and saved and closed to see at what point it crashes, and as soon as I had the Schedule Keys in the project it would crash.

Has anyone used Schedule Keys in Revit MEP 2013 yet? Seems like there must be someone out there that has done this. I know our architects use Schedule Keys all the time, but why doesn't it work in MEP? I'm not trying to make anything real complicated, its pretty basic stuff. This is my first time making Schedule Keys so I'm not sure if there was a similar issue in Revit MEP 2012.