Exception In Vl.crx Arx Command - Autocad

(defun c:MyCommand (/ *error*) (defun *error* (msg) (if (not (wcmatch (strcase msg) "*BREAK*,*CANCEL*,*EXIT*")) (princ (strcat "\nError: " msg)) ) (vla-endundomark (vla-get-activedocument (vlax-get-acad-object))) ) (vl-load-com) (vla-startundomark (vla-get-activedocument (vlax-get-acad-object))) ;; Your code here... (vla-endundomark (vla-get-activedocument (vlax-get-acad-object))) (princ) )

In some cases, the error appears when AutoCAD tries to generate a font preview or substitute a missing SHX font. Because font handling in AutoCAD involves LISP callbacks, a corrupt font file can cascade into an exception in vl.crx . autocad exception in vl.crx arx command

Preventing the "Exception in vl.crx ARX Command" is about maintaining a clean AutoCAD environment: (defun c:MyCommand (/ *error*) (defun *error* (msg) (if

An "exception" means AutoCAD tried to execute an illegal or impossible instruction – typically due to memory corruption, bad data, or a buggy script. or a buggy script.