I have several grids on a page that I have enabled the Telerik Busy Indicator using the RadAjaxManager. The busy indicator works fine on all of the grid except for one. I keep getting the error "Error: Unable to get property 'Cols' of undefined or null reference" only when I export to Excel or PDF. On the "btnRun" click the indicator displays like normal, but when I export I get the error. I did see another post in which this same error displayed but I've verified that I only have one instance of the AjaxManager.
<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" UpdateInitiatorPanelsOnly="true" ClientEvents-OnRequestStart="requestStart" DefaultLoadingPanelID="RadAjaxLoadingPanel1">
<AjaxSettings>
<telerik:AjaxSetting AjaxControlID="cmdLoad">
<UpdatedControls>
<telerik:AjaxUpdatedControl ControlID="usrStatus" />
<telerik:AjaxUpdatedControl ControlID="grdScoreCard" />
<telerik:AjaxUpdatedControl ControlID="grdEHSMonthlyStats" />
<telerik:AjaxUpdatedControl ControlID="grdScoreCardTitles"/>
<telerik:AjaxUpdatedControl ControlID="grdScoreCardFormulaEntry"/>
</UpdatedControls>
</telerik:AjaxSetting>
<telerik:AjaxSetting AjaxControlID="btnRun">
<UpdatedControls>
<telerik:AjaxUpdatedControl ControlID="grdScoreCardDashboard" />
</UpdatedControls>
</telerik:AjaxSetting>
</AjaxSettings>
</telerik:RadAjaxManager>