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[EnergyPlus_Support] Warnings convexity and surface

Hello,

I just begin to use E+ for an internship aboard (I'm French) and I have some warnings and I don't find the solution by myself. I saw there is a problem on the drawing file but I don't find who to figure out. It's a solar house. 

** Warning ** CheckConvexity: Zone="THERMAL ZONE 4 - STUDY", Surface="STUDY_ROOF" is non-convex.
   **   ~~~   ** ...vertex 2 to vertex 3 to vertex 4
   **   ~~~   ** ...vertex 2=[7.07,2.25,3.09]
   **   ~~~   ** ...vertex 3=[9.06,2.25,3.09]
   **   ~~~   ** ...vertex 4=[9.06,1.15,2.78]
   ** Warning ** CheckConvexity: Zone="THERMAL ZONE 3 - BATH", Surface="BATHROOM_ROOF" is non-convex.
   **   ~~~   ** ...vertex 4 to vertex 5 to vertex 6
   **   ~~~   ** ...vertex 4=[10.63,1.15,2.78]
   **   ~~~   ** ...vertex 5=[9.06,1.15,2.78]
   **   ~~~   ** ...vertex 6=[9.06,2.25,3.09]

   ** Severe  ** GetHTSubSurfaceData: Surface Openings have too much area for base surface=BEDROOM_EAST_WALL
   **   ~~~   ** Opening Surface creating error=BEDROOM_EAST_WINDOWBOTTOM
   ** Severe  ** GetHTSubSurfaceData: Surface Openings have too much area for base surface=BEDROOM_EAST_WALL
   **   ~~~   ** Opening Surface creating error=BEDROOM_EAST_WINDOWTOPTOP
   ** Severe  ** GetSurfaceData: Zero or negative surface area[-128.79044], Surface=BEDROOM_EAST_WALL
   **  Fatal  ** GetSurfaceData: Errors discovered, program 
terminates.


 Thanks for your help.



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