My company recently upgraded from ACAD 2009 to 2013. The one thing I'm having a problem with is in 3D.  In 2009, I was able to bring a block of a structural steel shape like a channel, explode the block, change the lines and arcs into on polyline and the extrude the shape to whatever length I wanted. When I tried this in 2013, the extrusion was a not a solid, but a hollow surface. What am I doing wrong?

Hello, maybe the object that you are trying to extrude was not a REGION ( altough it's working perfectly with circles and rectangles ) but a "simple" closed surface, try to transform your object in a region first.
Ask for more...philippe JOSEPH2012-12-17 07:40:21

Don't use Extrude use PressPull.

John, thanks for the presspull command information.
On my french release presspull is not a command so I searched in the AutoCAD dictionnary in the site and didn't find the translation, so I tried _presspull and it worked !
Now I will explore that command with it's options.
 
Is there a big difference between extrude and presspull ?

PressPull will work on lines, arcs, polylines, and splines.  The geometry just has to be closed.  It does not have to be represented by a closed polyline or a region.

[QUOTE=John Connor]Don't use Extrude use PressPull. [/QUOTE]



That worked! Thanks.