I have a problem exporting project to tekla structures. Actually it happens and exporting to revit.. The problem is that curtain wall panels drops or raises.
Thank you for your answers! http://s23.postimg.org/ixjx6fje3/Untitled.jpg
I suspect this is an issue with the IFC Translator. I would recommend especially for curtain walls exporting the geometries as BREP Geometries. This can be achieved prior to saving the IFC choosing a different IFC Translator or duplicating the general one and then open the Geometry Representation Options, pop a check into the box "use BREP geometry for all elements" write out the IFC and then check the results.