Copying drawing from AutoCAD 2010 to 2009

[RobertB]

I just ran into 2010 to 2009 conversion of MEP products that was stripping 3D information out on the saveas 2007 version. After finding this thread, scratching my head, and various wblocks, exports etc. I finally figured out why the 3D objects were converting down to polylines like previous posters mentioned. It ended up being a display representation problem. After correcting the displayrep in the 2010 file, the save down worked with minimal impact.

Hopefully this helps others, it took about 2 hours to figure out what was going on.

But what change did you make to the display rep? You don't mention exactly what you did.

[jasonp]

But what change did you make to the display rep? You don't mention exactly what you did.

Ahh, sorry about that... in "displaymanager" go into the current display rep and I toggled on "plan" representation. I'm not too keen on all of the control options in that are available, so I wasn't sure if "plan" will work for all cases of this happening.