This "ARX Error " comes because somebody has already worked in other software than plain "Autocad" Since this objects are not detected by Autocad it gives you this error or dialog box.
On Autodesk site there is option of installing add-on for your autocad so that these objects are seen as Proxy objects and you wont get these message.
But you should know the "ARX error" is due to what software since there are lot many fixes for these depending upon software and version
Last edited by Cad64; 23-02-2009 at 04:47 AM. Reason: Please do not advertise your business or paid services in the forum