https://community.graphisoft.com/t5/Collaboration-with-other/Archiforma-Ruled-surface-What-can-be-the-problem/m-p/141676#M15364 In order to be able to create a surface the two polylines must have the same number of nodes. At least this was the problem seveal years ago. Then I gave up ArchiForma for surfaces, because it was /and still is/ much easier to make the surface in Autocad or Max. Sat, 09 Aug 2008 07:15:28 GMT Anonymous 2008-08-09T07:15:28Z https://community.graphisoft.com/t5/Collaboration-with-other/Archiforma-Ruled-surface-What-can-be-the-problem/m-p/141675#M15363 <DIV class="actalk-migrated-content"><T>Does anyone know Archiforma? I've tried to make a surface from two 3D polyline with Archiforma but I couldn't. A window popped up with the following sentence: "select two 3D polylines to create this object." I don't understand it because I selected two 3D polylines as you can see in the picture attached. What can be the problem?</T></DIV><BR /><IMG src="http://community.graphisoft.com/t5/image/serverpage/image-id/74676i90FE97DB5EF7E714/image-size/large?v=v2&amp;px=999" border="0" alt="Archiforma-poliline.jpg" title="Archiforma-poliline.jpg" /> Fri, 08 Aug 2008 09:10:02 GMT https://community.graphisoft.com/t5/Collaboration-with-other/Archiforma-Ruled-surface-What-can-be-the-problem/m-p/141675#M15363 Anonymous 2008-08-08T09:10:02Z https://community.graphisoft.com/t5/Collaboration-with-other/Archiforma-Ruled-surface-What-can-be-the-problem/m-p/141676#M15364 In order to be able to create a surface the two polylines must have the same number of nodes. At least this was the problem seveal years ago. Then I gave up ArchiForma for surfaces, because it was /and still is/ much easier to make the surface in Autocad or Max. Sat, 09 Aug 2008 07:15:28 GMT https://community.graphisoft.com/t5/Collaboration-with-other/Archiforma-Ruled-surface-What-can-be-the-problem/m-p/141676#M15364 Anonymous 2008-08-09T07:15:28Z