Intermitent problem saving 3D files

[roger.renfrow]

I keep getting the "One or more objects in this drawing cannot be saved to the specified format..." error when working with AutoCAD 2013 and 2014 -only with 3D files - big or small. Files for the r2013 are saved as r2007 files, and r2014 as r2013. Sounds weird, but there are reasons. R2013 is on Windows7 on a network, r 2014 is on Windows8, stand alone. Both have 8gig memory and loads of HD space. The files are 100% AutoCAD, with nothing imported and nothing out of the ordinary has been added. Just solids, arcs and lines. I try to save, and get the error, and I noticed the visual styles changes to 'Current' and can't be changed. I've tried saving to different AutoCAD formats - DWG and DXF. I've tried WBLOCK, and exporting to different file types. I have also tried COPYCLIP, but get an error message for everything. I end up closing the file and losing data.

[asutton]

I have the exact same problem. AutoCAD 2014.

I had a client sitting over my shoulder, made me look highly unprofessional.

[maxim_k]

Hi,
If you have enough disk space in saving location (for local location) and if you have no network problems (if you save file to some network location), then:
Have you tried to run AUDIT command to fix potential errors in the drawing?

Maxim

[rrenfrow]

Yep.  Tried AUDIT.  (I tend to AUDIT a lot, since I deal with decades old DWG's at work.) I can't remember what the results were, except that they were unsatisfactory.   I've also tried letting it just sit for an extended period of time, in case there was some band-width issues or something that might correct itself.

And there's 711GB free space locally, and no records of network or PC connectivity problems from the Admin.)