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[EnergyPlus_Support] Re: Degenerate Surface Errors in EP6.0 to EP7.0 transition

I got the following sever error:

   ** Severe  ** GetSurfaceData: There are 1 degenerate surfaces; Degenerate surfaces are those with number of sides < 3.
   **   ~~~   ** These surfaces should be deleted.
   **   ~~~   ** For explicit details on each problem surface, use Output:Diagnostics,DisplayExtraWarnings;

I have added Output:Diagnostics,DisplayExtraWarnings but I am not able to find what surface generates that problem. Where should the extra warnings be? In the *.err file?
Best Regards
Francesco Passerini



--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Linda Lawrie <linda@...> wrote:
>
> At 02:59 AM 12/19/2011, Adil SMH wrote:
> >Are there some more stringent topology check added in EP7 then 
> >earlier versions? and finally what can be done to remove this.
> 
> Yes, there is more stringent checking in V7.  In particular, surfaces 
> with coincindent vertices have those vertices removed until there are 
> 3 sides left -- but these are still coincident.
> 
> Use the Output:Diagnostics, DisplayExtraWarnings; (as noted in the 
> error file) to show each problem surface.  You should examine them 
> and, if they are all coincident vertices, remove the surface.  (You 
> can easily test by commenting out that particular surface in a text 
> editor).  Or create a backup of your idf, and remove the offending surfaces.
> 
> These surfaces cause the shading calculations not only to do extra 
> work but probably somewhat inaccurate work.
>



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