Steps to solve error: "XXX is not a registered script control. Script controls must be registered using RegisterScriptControl() before calling RegisterScriptDescriptors()"

[Dan Lehmann]

Hi,
I've been searching the forums and it looks like this is a common problem. Unfortunately, I cannot find a solution, partly because many of these issues were solved with support tickets, but the forum posts never got the details of the fix.

Can you please give me steps to take to troubleshoot it? What should I be looking at? Because of the time involved to strip the project down, I'd rather not submit my project, just looking for the general direction I should take in my troubleshooting.

Related threads: http://www.telerik.com/community/forums/aspnet-ajax/scheduler/radgrid-inside-scheduler-advanced-edit-insert-form.aspx
AND: http://www.telerik.com/community/forums/aspnet-ajax/scheduler/script-control-radajaxmanager1-is-not-a-registered-script-control.aspx

Thanks in advance,
Dan

<edit>
OK, so I have a RadWindowManager in 2 UserControls that are included in my advanced form. I made it past this error, I set each RadWindowManager and each RadWindow to RegisterWithScriptManager="false".

Unfortunately this brought me to the following error if I trigger an action that should show the RadWindow from the User Control: "Multiple controls with the same ID 'RadWindowManager3_alerttemplate' were found..."

I have everything ajaxified. Googling this error tells me that it is probably because my usercontrol is getting added dynamically more than once. How do I fix this?

Thanks,
Dan

</edit>

<edit2>
Hi, I'm preparing to submit a support ticket.
</edit2>