Extrude error with lines from imported polyline DXF or DWG model

[andre_dms]

Why can't Revit make extrusion from polylines of imported DXF or DWG models? Revit 2013 update 3.

[andre_dms]

The DXF file actually is made of splines. It is all 2D lines, exploded into Revit. It would be a must be able to extrude from splines inside Revit.

[Alfredo_Medina]

Why don't you draw this in Revit?

[andre_dms]

This, obviously, is just a small portion of a very complex, big drawing, and I need to import. After all, this question is feature related.

[constantin.stroescu]

can you post the dxf or dwg files ? 

All the test I made in Revit 2012 and Revit 2014 , work ...the extrude is ok - dwg and dxf ...I make the test as mass element and as Component -generic model...

I had some similar problems a while ago when importing some polylines composed of too many lines . In such a  case , I think that, it's better to redraw the shapes  ( as Alfredo suggests )

[andre_dms]

Here is a test file - just a random spline drawing saved with Autocad Arch. 2013.