When attaching a polyline layer, I get a message that says “Unable to open object.” Why?
AutoDesk has deprecated POLYLINE entities. TRIRIGA now supports only AutoDesk LWPOLYLINEs. Perform a list function on the entity to see if it’s a POLYLINE, not a LWPOLYLINE. POLYLINE entities are no longer supported. If you suspect issues within TRIRIGA Graphics or CAD Integrator related to polyline-like entities, please check this. If it shows as a POLYLINE, use the AutoCAD CONVERTPOLY command to perform the conversion.