Back in R14 the attached error handler would bonk out and then spew the code in the buffer to the command line so you could see where it failed. I can't seem to get it to happen in 2000 or in 2000i. Do you know if it is a variable setting?

(defun c:en ()
(if (= *error* nil)
(defun *error* (msg) (command)
(princ (strcat "\nbonk1: " msg)) (princ)
)
(setq *error* nil)
)
)
(c:en)
(c:en)
(princ)

To toggle it on/off just type "en" at the command prompt...

Bill Hashman
-------------------------
Prior to AutoCAD 2000, AutoLisp would dump a bug trace to the command line when an error was encountered. While developers went out of their way to suppress this behaviour in a released product, it was a handy tool during the debugging cycle. To get the same behaviour in AutoCAD 2000, replace the standard error handler with this one :

;CODING STARTS HERE
(vl-load-com)
(defun errdump (s)
(vl-bt)
(princ)
)
;CODING ENDS HERE