I'm trying to use this plugin in SketchUp Make 17.2.2555 and I see this when SkecthUp starts:
Error Loading File Dxf_In_v2.2.rb
Error: #<SyntaxError: C:/Users/bitzb/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/Dxf_In_v2.2.rb:306: formal argument cannot be an instance variable
ramFile.each do |@line| #search for entities @line by @line

                      ^>

Is there anyway to fix this?