No-Solicitor Sign (From generator) - fails

thingiverse

I wanted to make a No Solicitor sign so I gave the generator (from which this is derived). The resulting file lacked several features I wanted. These are the result of the effort. HOWEVER! There is a problem found in SCAD or the file that I lack understanding of how to resolve. Any ideas? Instructions Put these two files into the same directory and run openscad. The text (the portion of the design that comes from the DXF file) is visible when I press F5, yet it is not when I press F6. OpenSCAD gives me: clip --------------------------------- CGAL error in CGAL_Build_PolySet: CGAL ERROR: assertion violation! Expr: check_protocoll == 0 File: /media/code/mingw-cross-env/usr/lib/gcc/i686-pc-mingw32/4.6.2/../../../../i686-pc-mingw32/include/CGAL/Polyhedron_incremental_builder_3.h Line: 198 ----------- clip. I moved it to a computer with a real graphics adapter (i.e.: Not an Intel thingy but NVidia) and I get: clip ----------------- ERROR: Illegal polygonal object - make sure all polygons are defined with the same winding order. Skipping affected object. --------------- clip In BOTH cases I get no text. Any suggestions?