Missing the \"/\" function. Aswell, as there\'s a lil too much space, thats not needed.
Also, make the editbox \'read only\' as you use the buttons anyways. To avoid issues.
the menu:
menu * {
$iif(!$dialog(DNAME),Calculater,$style(2) Calculater): dialog -m DNAME DNAME
}
or
menu * {
Calcluater: dialog $iif($dialog(DNAME),-v,-m) DNAME DNAME
}