I'm having trouble loading an XREF, that normally works fine. When I try to load the .dwg I get a message saying: ** Error: "drawing name" is already a standard block in the current drawing. In fact, I can see the layers from my XREF in my Layer Properties Manager, but the prefix looks a bit funky. All layers have a $0$ prefix. I've never seen this before. I'm using Map 3D 2012. Any ideas on a solution? Thanks in advance.
David