3D Objects have disappeared?!

[asdemeter]

I am using AutoCAD 2018.  I have a drawing that's got a bunch of 3D objects in it.  For some reason, it suddenly wouldn't allow me to snap to ANYTHING 3D.  Went to other drawings, no problems.  OK.  So I did an audit, and it said it found some errors, which I had it fix.  Restarted AutoCAD...no luck.  I thought, well...I'll just restart the computer.  Reopened the drawing, and every single 3D object is gone.  Just not there.  I went to Quick Select, and it allows me to select all the 3D Solids...and all the grips show up...but nothing else is there.  I am at a total loss, but I know that I have hours of work in this project and can't afford to lose it all now, if at all possible.

Please note...I can't respond quickly all the time.  And I can't just upload all sorts of drawings, etc., so I can't always give it to you to diagnose that way.  I just need ideas and to try it, or hopefully someone that's gone through it already, and has a fix.  I've exhausted myself searching for anything that's close online.  lol  

Thanks in advance for any help anyone can give me!

[asdemeter]

UPDATE:

I tried copying everything to a new drawing, and now I can see things.  But I'm hoping someone knows how I can prevent this in the future, or if there's some sort of setting I've got wrong, because I'm worried that may not always work if this happens again.  Thanks!

[asdemeter]

UPDATE AGAIN:

Upon closer inspection, no...that didn't work for all the objects.  A whole slew of them are missing.  I am running out of things to try!

[pendean]

AUDIT and RECOVER commands will delete unrecoverable objects when they are found: either command should have told you as much at the commandline or a pop-up.

Did they?

Rename a BAK or SV$ autosave file, or go back to yesterday's server backups to recover would be the next steps you need to take.

[asdemeter]

Tried those things.  The backup is too quick, apparently.  lol  What I'm noticing is that if I Quick Select 3D Solids, I get (42) of them...but then when I deselect the visible ones, I get (20).  In other words, the 20 objects are there...but I can't see them.  Going to try to work with that, but this is the weirdest thing I've seen in some time.  lol

[asdemeter]

Anyone have any other ideas?  I've looked everywhere...tried everything...really trying to not have to redraw all of those objects, especially when they're actually there, according to AutoCAD.  

[beyoungjr]

Hi,

I hope you have been saving to new file names incrementally?

Can you post the oldest file you had trouble with?  Maybe we can take a peek and see what could be at issue.

Also, can you confirm that he file was initially created in AutoCAD?

Blaine

[john.vellek]

Hi @asdemeter,

Have you tried BREP (for 3D solids) or REGEN3 (for surfaces)?

If you can share your file I am happy to take a look at this issue for you. 

If your data needs to be private or confidential, please email it directly to me at john.vellek@autodesk.com and please include a link to this thread in your email.

Please select the Accept as Solution button if my post solves your issue or answers your question.

[GrantsPirate]

Try 3DCLIP command, pick on the upper right two icons to toggle the clip planes on and off.  It is a long shot based on your description but worth a try.