We debugged the project and investigate the issue.
Actually you get the undefined error in all the pages. Not only in the ajaxified. The difference is that this error does not prevent the page to work fine when it postbacks. You can use FireBug
in Firefox to see these errors.
After adding telerik columns in the grid and removing mwc columns the problem disappeared. We are not sure which of the mwc columns causes the error. You can debug them one by one and determinate from where the problem comes.
Another error we get on clicking "popup with error" is:
"The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>)."
This error occurs because the code blocks should be escaped when using Ajax. In order to fix this wrap the code in which you use inline server tags into a RadCodeBlock
. And if this does not solve the problem place your controls into RadAjaxPanel instead of adding them into the RadAjaxManager.
All the best,
the Telerik team