Unable to get trusses to generate. Something wrong with the room def in "attic" area.

[GeneDavis]

I am trying to do a workout on a production-built plan that has a few modest changes, and the workout is to get all the framing modeled, to assess feasibility.  It's a challenge.

 

We've no idea how this roof frames, but it's very likely a hybrid arrangement of some stick framing and trusses, so I've tried that.  If you open the plan file to see where things sit right now, you can see that in plan view upper right, that trusses won't generate, and I cannot figure out why.

 

This is my first time attempting a plan attachment from the X17 project managment setup, and I've exported a .caproj file, the export producing a zipped file, and in the project only the plan file is included.  See if this works.  https://drive.google.com/file/d/1yCv_8U-rSPt1Ub3DviHKXOuwgZuTz_Dg/view?usp=drive_link

 

In the screencap attached here, I have aimed the camera at the part of the roof that won't frame with trusses, assuredly so because I have not done room def properly, but I am stuck, so here it is.