Running Civil 3d 2011 on Win7 64bit, and I have done this on multiple computers, only ones that worked for me are XP. I just want to put this out there for someone else to confirm that it's not just my configurations causing this.
Draw any pipe network, in the edit network, pick the table vista and then the pipes tab. If you modify any other items other than invert it will work, but as soon as you try to change the Z elevation of a pipe, it crashes the application.
Anyone willing to test on 2011, 2012 or newer C3D to see if present?
I would appreciate any help the community can offer on this.