This is the specific error that we have when attempting to:

1.) Create the form in the page dynamically (the page has grid and the grid has add button event)
2.) When the add button is clicked, a class that dynamically creates the edit form (RadWindow) is called. It creates the controls dynamically and put them in a formview.
3.) Some controls are dropdowns, the problem is when a combo box is clicked this error pops up.

Could it be that the ComboBox fails to address the ajax events correctly?

Any thoughts?

Note: I've tried to do the same using a RadWindow manually created on the page and it runs.

Forms are build OnInit Event and RadAjaxManager are attach on PageLoad.

Thanks,
Edward

Hello Edward,

This error is not directly related to the RadControls - I would suggest to check this Google search for more info on the subject.
If you still experience problems or you believe that the problem is in the RadControls that you are using, please send us a small sample project where the error can be reproduced and we will check it right away.


All the best,
Georgi Tunev
the Telerik team