[SOLVED] Uncaught TypeError: Cannot call method 'addChangeListener' of undefined

[uxbod]

I am trying to add a listener to my Zimlet using the following

var signit = appCtxt.getSettings().getSetting(SIGN_MAIL_PREF);
signit.addChangeListener(new AjxListener(this, this._signChanged, [signMenu]));

but when I re-fresh the page in the debug window I see the 'addChangeListener' undefined message. What causes that ? I have a 'new' AjxListener so why would it not be defined ? Thanks.

[tdesorbaix]

Did you define SIGN_MAIL_PREF as a String containing "SIGN_MAIL_PREF"?
If not, then the line should be :
var signit = appCtxt.getSettings().getSetting("SIGN_MAIL_PREF") ;

[uxbod]

Did you define SIGN_MAIL_PREF as a String containing "SIGN_MAIL_PREF"?
If not, then the line should be :
var signit = appCtxt.getSettings().getSetting("SIGN_MAIL_PREF") ;

signit was not being defined as deeper down the chain an error was being thrown. Once I resolved that problem the variable assignment work and the listener was created. Thanks.