corrupted layout tab dwg?

[darreng_oa]

i have been working on a DWG (c3d 2012) most of the day, and sure enough, after my last edit in Model space, c3d crashed.  

i can remain in model space, but once I try on open the only layout tab, c3d hangs and crashes.  i was able to create a new layout in the command line and rebuild my layout, but i still cannot open the original tab without a crash.  i ran AUDIT and found 2 errors, but if i allow c3d to fix or delete them, c3d crashes.  also, if i run PURGE, c3d crashes.

any idea how i can determine what is at fault or a method to maybe even isolate the problem? maybe a trick?

tia

[Jay_B]

Is there possibly a bak or sv$ autosave file available to revert to if you can't fix the errors?
Have you tried deleting the original layout?
I've had success with finding a recent copy by rt clicking on the dwg in win7 windows explorer.. There's a "previous version" and at times multiple listings of previous save times that may be restored, other times they are blank.