how come in meshcam when I open an autocad dxf file it does this.

how come in meshcam when I open an autocad dxf file it does this. There is supposed to be a border around the yellow spots marking out the part.
thanks

bad file, dont use mesh cam for dxfs. convert them to svg with illustrator or inkscape and put them into makercam http://www.makercam.com/

maker cam gives you excellent control over tool paths.

if you want to use meshcam make sure you have sketchdoctored your design in autocad before exporting