properly destroying GUI controls?

[maximus_asinus]

I'm currently having issues with a custom sign system I am creating. I think the bug exists because the GUI controls aren't being destroyed properly (working theory for right now). This is how I am destroying the controls:

PHP Code:

function DestroyGUI() {
  hideimg(200);
  first_object.destroy();
  second_object.destroy(); 
} 


Both are GuiBitmapCtrl controls which contain other controls. And this seems to work fine when you interact with one sign, but once you touch a second sign the F2 log starts throwing errors.

Script: Function first_object.destroy not found in function DestroyGUI of maximus_debug in script of Sign (in level maximus_asinus_test_03.nw at pos (44, 14))

Script: Function second_object.destroy not found in function DestroyGUI of maximus_debug in script of Sign (in level maximus_asinus_test_03.nw at pos (41, 14))

Once this starts to happen the sign starts pulling text from the other sign. I've read through the wiki about a dozen times now, and I still don't understand what I'm doing wrong.