Some lines not on xy plane not printing

Using AutoCAD 2010. While printing a 3D object, some diverging lines won't print. Especially one side of a round pipe.

What visual style are you using?

Did you change any system variables that might affect the display of lines or edges in 3D models?

Model space objects are set to Realistic, Viewports are set to hidden.

dispsilh is set to 1.

A screenshot and a sample dwg file would greatly increase the quality of the help you recieve.

How do I do that? I've created a PDF. Can I post that?

An actual DWG file would be better. One can be attached to a subsequent post. Start by clicking on the Go Advanced button. There is a file size limit. A PDF doesn't cut it.

Press Prtscrn its up on the F keys normally open Paint then paste, clip the image copy only relevant bit needed do a new and paste clipped image, save the image then use the attach image option under Advanced option of the post screens here bottom right. I use a screen capture program saves clipped screen grab. GADWIN.

To solve the problem we need the drawing itself. Not a PDF. Not a JPG. Not a PNG. A DWG file. Got it? Thanks.

There appears to be nothing in model space other than a reference to the path of the drawing. That doesn't help much.

ReMark, just figured it out. I had overlapping objects in the model. Thanks.

I see. OK. Well thanks for updating us.