What makes you think an OE installation for Open Light objects is a solution for C3D objects?!
R2013 introduces a new DWG format.
As did R2010, R2007, R2004, when you open a drawing with Custom/version-specific AEC objects in a newer DWG version of AutoCAD and QSAVE the file, all the AEC content get 'upgraded' and there is no way for them to go back down except as Proxy Objects. Regardless of what you set SAVE format to in the version you saved the file in.
AutoCAD upgrading 101 reality that's not changed or changing: don't use R2013 (or R2010, R2007, R2004) if you rely on older versions to complete and finish a project in the office or with consultants/partners.
Now we get to post this for the rest of this year to remind folks about it all over again.
I figured out how undo the 2013 corruption in a drawing.
Open 2013 and the corrupted drawing, then save-as file type AutoCAD R12/LT2 DFX (*.dxf)
Then in AutoCAD 2012 open the DXF (VIA open file, and selecting DXF File type) and the you can save it as a corruption free DWG.
And to complete the fix you send feedback to Autodesk suggesting the fire all involved in 2013, and that is everyone from those you picked the features to quality control.
Same problem here Heinsite. I left 2012 on my machine just in case and I get the same window when I close 2012 now.
As for the AEC warning I also noticed my documents folder filled with .png files, just deleted them all.
Hold up on fixing it via the DXF trick I just posted, I did it do anther drawing and so far a noticed that the fronts are all #%*-uped and hatch to back no longer works.
heinsite wrote: ..when closing a session of 2012 this lovely little nugget appears
This error comes up without 2013! I only have 2012 products installed, and this is a semi-frequent error when closing C3D 2012, very rare when closing ACA/MEP 2012.
Sorry, but you can't blame that one on 2013! ~ Mary
The connection to C3D may well be valid because all of the files that displayed this on my system had originally been created using with C3D 2011 even though they've cycled back and forth thru vanilla ACAD 2012 and LT 2012 many times.
>> Sorry, but you can't blame that one on 2013! ~ Mary
But I never got this dialog as long as 2013 was not installed. Yes, some threads here say they got them, but for me it appeared with installation of AutoCAD 2013.
- alfred -
I just noticed that you wrote C3D 2012. The version I've been using (at work) is 2011. I've never seen this error dialog before, not on C3D 2011, nor on any of my personal LT or full version installations thru 2012. It only showed up when I made my trial installation of AutoCAD 2013. That's when it corrupted my 2012 installation.