RADToolTip Manager error

[mohsinjk jk]

Hi 

I am using RadToolTip manager with RadGrid. i am facing a problem regarding RadToolTip manager.
Basically in my web page i have two RadGrid. when i go first time on both radgrid items then radtooltip manager appear.
but after first time its gave me exception.
"Line: 6580 Error: Sys.InvalidOperationException: A control is already associated with the element."
and 
" RadToolTipManager response error:
Exception= Sys.WebForms.PageRequestManagerServerErrorException:
Invalid JSON primtive:.
"
What does it means. One thing more "Can I use two RadToolTipManager in one webpage" because if i use only one radtooltipmanger with one radgrid or control it is work ok. but when I use more than one it throw above exception. why ?

please guide me

I have implemented this functionality using below example:
http://demos.telerik.com/aspnet-ajax/tooltip/examples/tooltipversustooltipmanager/defaultcs.aspx

[Svetlina Anati]

Hello mohsinjk jk,

 I am not sure what could be causing the problem and what I can assume is the following:

1) You do not clear the TargetControls collection when needed - e.g when a page is changed or the grid is sorted, etc. If so, please make sure that you clear it properly.

2) If you have ajaxified the grid make sure that you update the corresponding tooltip manager in every case when the targets are updated.

3) Make sure that you do not have special signs such as {, }, /, etc as IDs

As to your other question, it is absolutely valid scenario to have more than one tooltip manager on the page and this should not cause issues.

Sincerely yours,
Svetlina
the Telerik team