I have drawn all my pipework in Autocad 2011 with CAD-Duct, works perfectly inc. small viewer in AutoCAD picks up pipework without fail.
Load the DWG into Navisworks....
Now all I an see is objects that i've extruded myself and that's not in the CAD-Duct library.
Is this just a Object Enabler that is missing? I thought to myself though if I can see the pipework in AutoCAD then it must be a different problem.
Some advise would be greatly appreciated