Civil 3D 2013 Crashing on Export to CAD when pipes in profile view

[Jon0001]

So I have been getting a fatal error "INTERNAL ERROR: !dbobji.cpp@8743: eNotOpenForWrite" when I try to export to 2010 CAD.

I have worked out that it happens when pipes are displayed in the profile view.

ANyone have this problem or know of a fix?

[tcorey]

Did try a Recover?

[Jon0001]

Yes we have tried a recover and audit and removed all xrefs

[troma]

Check that none of the layers associated with pipes in profile view are locked/frozen.

Test: try exporting to ACAD 2013 first.  Then open that up and export again to 2010.

[Jon0001 · Accepted solution]

We ended up redoing the drawings and all is working fine now.

[engngr_ats]

Keep getting the internal error.
Jon0001, redoing the drawings? What did you do exactly?

[Jon0001]

We ended up purging the Civil 3d of all excess settings and styles and it seemed to work.

[engngr_ats]

Decided it would be the same or easier way: save c3d .dwg with proxy images, then open .dwg in plain autocad [, explode proxies and finally remove proxies if it's nessesary].