I have AutoCAD 2011 2012 & 2013 installed. All are needed for various reasons.
The problem is, when start a new project AutoCAD 2012 library is automatically referenced. Even if I try to remove it, AutoCAD does nor allow it saying that it is in use. I can't even find AutoCAD 2011 library in the list of references. And I want to reference 2011 library only.
Is uninstalling AutoCAD 2012 the only option?