Hi,
I am getting following error in scheduler. 


Message: '0._preInitialized' is null or not an object
Line: 1144
Char: 1
Code: 0
URI: XXX/Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ScriptManager1_TSM&compress=1&_TSM_CombinedScripts_=%3b%3bTelerik.Web.UI%2c+Version%3d2011.3.1115.40%2c+Culture%3dneutral%2c+PublicKeyToken%3d121fae78165ba3d4%3aen-US%3acf16ab29-be3a-4761-9f9e-2c05ea68ff51%3a4c8be21a%3a650fdad%3aef9d9f4a%3aa51ee93e%3a59462f1%3a19620875%3a39040b5c%3af85f9819

This error is intermittent but frequent, I tried reproducing the error in a sample code, but the error is not reproducible there. Few things which might be helpful.
1. I am using the scheduler inside a usercontrol
2. This user control is loaded inside an updatepanel.
3. I am also using RadTooltipManager to show tooltips for appointment 
4. The user control has radajaxmanagerproxy which update the scheduler and tooltipmanager
5. This error usually comes when I try to navigate between views.

  The axd script which throws error is 

b.RadScheduler._preInitialize=function(p,o,m,k,l){var n=d("#"+p);
if(n[0]._preInitialized&&!$telerik.isIE){return;
}
Please let me know if this is a known issue or at least what this script is trying to do

Hello Pooja,

Check the following forum thread which discussed similar scenario.
Java Error on Scheduler

-Shinu.

I applied the registerscript solution, but it is still giving me the error.

 I don't think problem is with any missing javascript, problem is in the line
if(n[0]._preInitialized&&!$telerik.isIE){return;
} 

while debugging I got "n" as calendar control but n[0] was undefined. While navigating before going to sever, it is making this javascript call, any idea on this.

Hi Pooja,

In fact, SharePoint has issues when the RadAjaxManager is declared at markup in a user control.

Let me suggest you overcome this by adding the RadAjaxManager at OnInit event of the web part.
Additionally please add the AjaxSettings in this manner:


The code above is quite simplified – one RadCalendar updates one  RadScheduler  - but I believe it illustrates the approach properly.
In case the issue persists - please provide us more details about your implementation.

Regards,
Kalina
the Telerik team

Hi Kalina,

My issue is not related to sharepoint, it is more related to dynamically loading a user control(say scheduler control) in the page. This user control contains scheduler, first time when schedulercontrol is loaded scheduler is working fine, on some other event I am reloading the schedulercontrol, then when I navigate between views, I am getting that javascript error.

Hi,

Can you try to isolate the problem further by removing separately RadToolTipManager and RadAjaxProxy and test if the error is still reproducible?

Kind regards,
Peter
the Telerik team