Carlson Survey 2006

Can anyone shed light on the reasons for continuation with the 2004 CAD
engine rather than building around the 2006 one?
Will Surevy 2004 accept dwg files produced by Autocad2006?
doug
engine rather than building around the 2006 one?
Will Surevy 2004 accept dwg files produced by Autocad2006?
doug