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scheduler.attachEvent - onXLE - Type mismatch error on F5 Refresh

Hello,

My project has been working fine but now, out of the blue, when I press F5 to refresh a page I'm getting an error:

htmlfile: Type mismatch.

It's happening in this function from dthmlxScheduler.js:

scheduler.attachEvent("onXLE", function () {
var A;
if (A = this.config.show_loading) {
this._obj.removeChild(A); <<<----------- happening here ******
this.config.show_loading = true
}
});


If I select to Continue, then the program continues on but the loading animated GIF continues going.

Thoughts?



Here is my code that configures and calls the Scheduler:

scheduler.config.xml_date = "%Y-%m-%d %h:%i%a";
scheduler.config.default_date = "%M %d, %Y";
scheduler.config.month_date = "%M %d, %Y";
scheduler.config.day_date = "%D, %M %d";
scheduler.config.hour_date = "%h:%i%a";
scheduler.config.readonly = true;
scheduler.config.details_on_dblclick = true;
scheduler.config.lightbox.sections = [
         { name: "description", height: 130, map_to: "text", type: "textarea", focus: true },
         { name: "time", height: 72, type: "time", map_to: "auto" }
     ]
scheduler.config.date_step = "7";
scheduler.config.multi_day = true;
scheduler.config.drag_create = false;
scheduler.config.drag_move = false;
scheduler.config.drag_resize = false;
scheduler.config.dblclick_create = false;
scheduler.config.show_loading = true;
scheduler.config.icons_edit = ["icon_cancel"];
scheduler.config.icons_select = ["icon_details"];

scheduler.locale.labels.icon_delete = "";
scheduler.locale.labels.icon_save = "";
scheduler.locale.labels.icon_edit = "";
scheduler.init('scheduler_here', null, 'month');

scheduler.setLoadMode("month");

scheduler.attachEvent("onClick", function() {
return false;
})

scheduler.load('codebase/schedulerData.aspx');


My schedulerData.aspx page simply returns data from a stored proc that's been put into proper XML format.

I'm really not sure how is such situation can occur. 
Please try to use the attached js files - each of them contains different updates , which are related to described situation. 

That seemed to help some.

The error is going away but the animated GIF is still there after I press F5 or if the user is redirected back to the page.