Reactors are indeed very active. When you design an application that relies on them, you could very well spend a great deal of time crashing your program and possibly crashing AutoCAD as well. It helps to have a tool available to remove all the reactors you have added, if necessary.

The gpreact.lsp file includes a function gp:clean-all-reactors that doesn't do much on its own. Instead, it makes a call to the CleanReactors function. Add this function to your utils.lsp file by copying the following code to the end of the file:

;;;--------------------------------------------------------------;

;;; Function: CleanReactors                                  ;

;;;--------------------------------------------------------------;

;;; Description: General utility function used for cleaning up  ;

;;; reactors. It can be used during debugging, as  ;

;;; well as cleaning up any open reactors before   ;

;;; a drawing is closed.                           ;

;;;--------------------------------------------------------------;

(defun CleanReactors ()

 (mapcar 'vlr-remove-all

 '(:VLR-AcDb-reactor

 :VLR-Editor-reactor

 :VLR-Linker-reactor

 :VLR-Object-reactor

 )

 )

)