Hi Michael,

Yes, i have triangular faces made and formed a solid out of them. When i imported the .iges file the object's faces came in as "Closed crv", so that i only had to use the Planar command on all of them once, and then i joined all the faces to get a solid. I only had to duplicate the Closed crv to Separate them and use them with your script. For easy identifying i used a Style on them.

Best regards
Stefan