How to STOP externnotify from running after voicemail access

How can I prevent externnotify from running a script again after voicemail is accessed? I have a script that runs after someone leaves a voicemail which creates a callfile that is seto call a LOCAL/s@subroutine_to_run, and the app actually makes an outbound call to notify a user a voicemail was left and then connects them to voicemailmain so they can check the message. However, after they end the call the script runs again and calls them again, ad nauseum. This results in an endless loop which is of course a VERY undesired effect! Is there some way to keep this from happening?? Some switch/variable that can be set? I’m running Asterisk 11 if that makes a difference. Thanks.

Kevin :unamused: