I'm trying to link an Autocad MEP dwg into our Revit file. The problem I'm having is when I open the file in ACA 2009 to wblock if or even save it and delete everything else except the 3d portion and after wblocking it I go to open it in my regular Autocad 2009 and it doesn't show up. What am I doing wrong. Does anybody have an answer or a suggestion as to what can be done? The firm the sent it doesn't have Revit MEP just Autocad 2008 MEP. Have a nice day.