Exterior wall Conflict on Cathedral ceiling

[Resbarbosa]

Could someone help wit this conflict ? Interior show the siding on my addition w/ cathedral ceiling if I change the wall to interior wall outside shows the drywall. Any way to cut the wall ? os select anything to solve this conflict ? 

 

Thank you 

[tundra_dweller]

Try this in that wall's dbx if you want to keep the wall below the roofline.

 

 

Try this if you want the bottom of that wall cut off at the roofline.

[Resbarbosa]

Thank you so much, problem solved