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[Benjamin McWhorter <>]

Hello,

I am having the following problem when joining together two simple and valid 
Nef Polyhedron.  I was hoping somebody could help me understand why the 
resulting Nef is not simple.  I have attached the original .obj files and the 
.OFF files.

After the join, the resulting Nef is not simple.  If I try to convert that 
Nef to a polyhedron, I get this error:

> CGAL::Polyhedron_incremental_builder_3<HDS>::
> lookup_hole(): input error: at vertex 1 a closed surface already exists and 
> facet 14 is nonetheless adjacent.
>             The closed cycle of facets is: 5 1 2.

I am sorry if this is a simple question, but I have not been able to come to 
any conclusions.

Thanks,
Ben.

Attachment: output4Orig.OFF
Description: Binary data

Attachment: output3Orig.OFF
Description: Binary data

> 
>

Attachment: Input2.obj
Description: Binary data

Attachment: Input1.obj
Description: Binary data