Parallel pipes and crossing in profile view disappeared

[mermerCAD]

Hi all-

My colleague added parallel pipe networks and crossings to multiple SD profile views yesterday.  Today, he came in, turned on AutoCAD, opened the drawing, and the parallel pipes and crossings were gone.  The working folder had reset itself to nowhere so we reset the working folder and Data Shortcuts Folder, but that didn't bring them back.  We can go into the profile view properties<pipe networks tab and turn the pipes and structures back on and override the styles, but that is basically redoing everything we did yesterday.  Is there a way to avoid having to redo everything?  Is there a way to avoid this from happening in the first place?

Thanks in advance for you help!

Meredith

C3D 2013

Windows7 64 bit

[mermerCAD]

Now every time I open the same file, I get the attached error message.

Is this code for "You are so f***ed"?

[troma]

Could be.

Have you tried:
Recover the drawing?
Audit the drawing?
Close the program and start it again?
Shut down the machine and reboot?

[mermerCAD]

I did a partial open and recovered the drawing.  It seems to work fine for me, but every time my colleague hits ctrl Z, either the parallel pipes disappear or their labels disappear. 

Has this happened to anybody else?

Thanks!

Meredith