I am getting error on starting AutoCAD Architecture 2011 and Autodesk Architectural Desktop 2007
I am getting the same issue... with AutoCAD MEP 2012. This is strange all of the sudden 3 people have the same issue.
I am thinking some other force is at work here… anyone else have this issue?
In instalation cd go to : acad2012m_x64\x64\acad\Program Files\Root\Express and copy aceauto.lsp.
Replace the aceauto.lsp file found in this folder C:\Program Files\Autodesk\AutoCAD 2012 - English\Express\aceauto.lsp by the other one (acad2012m_x64\x64\acad\Program Files\Root\Express and copy aceauto.lsp).
hope it was helpful.