https://forums.autodesk.com/t5/autocad-map-3d-developer-forum/error-tracking/m-p/1128517#M4147 code written in lisp in map3, where i had and error, i could track it by the error function the result was that i got the error place in the command line.<BR /> while in map6 i just get a message that i have an error in the lisp file.<BR /> ex: i got this message -&gt; error: bad argument type: stringp nil Wed, 08 Sep 2004 14:50:54 GMT Anonymous 2004-09-08T14:50:54Z https://forums.autodesk.com/t5/autocad-map-3d-developer-forum/error-tracking/m-p/1128517#M4147 code written in lisp in map3, where i had and error, i could track it by the error function the result was that i got the error place in the command line.<BR /> while in map6 i just get a message that i have an error in the lisp file.<BR /> ex: i got this message -&gt; error: bad argument type: stringp nil Wed, 08 Sep 2004 14:50:54 GMT https://forums.autodesk.com/t5/autocad-map-3d-developer-forum/error-tracking/m-p/1128517#M4147 Anonymous 2004-09-08T14:50:54Z