Hi Siva,
I have seen this error when the RadHtmlChart is inside updated with AJAX (inside an update panel or RadAjaxPanel, or a setting in the RadAjaxManager), that is itself inside a RadPane inside a RadSplitter. We are aware of this scenario and it is logged for research. In the meantime there are several ways to get around it:
1) avoid using AJAX in this case if possible
OR
2) update the entire RadSplitter instead of only parts of the pane if suitable
OR
3) add the following override at the end of the form with the splitter, but test it carefully as it may break something else:
Telerik.Web.UI.repaintchildren = function ()
{
}
Regards,
Marin Bratanov
the Telerik team
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