My 3D object is non-copyable and non-displayable in conceptual mode

[Anonymous]

Hi,

  I have attached my drawing file, which include some 2D and 3D objects.

  When I changed to view mode other than 2D Wireframe, such as conceptual mode, all 3D objects disappear.

  When I intend to copy and paste a 3D object, the new 3D object does not appear at all.

  When I rotate the viewing angle, 3D objects disappear.

  I do not have any of these problems before but today. Do you have any idea what might be the cause of them?

  I am using AutoCAD 2013 on a Win2008 server, having hardware accelerator both on and off tried but no difference. I am not running any memory-consuming program.

Raymond

[Anonymous · Accepted solution]

The attached drawing has no 3D elements in it

It has 2D parts but these are at differing heights (different Z values)

[Anonymous]

Ok.. That's weird, because as in the attachment I am able to see them, and I did make those 3D objects. If those objects somehow are corrupted or what so I cannot manupulate them, that is then an explanation, and could be also why you couldn't see any of them... Since it does not affect me to build new 3D objects, I think I will just rebuild them. Thanks for your time.