user control loading JS error - Microsoft JScript runtime error: Unable to get value of the property 'length': object is null or

[reezvi]

Hi,

Im having trouble loading user control pages to container page. While loading the container page, a runtime JS error appears saying - "Microsoft JScript runtime error: Unable to get value of the property 'length': object is null or undefined".

It should be noted that my user control pages have GridPanel, Comboboxes, related stores and javascripts in them. I tried to debug and found that if I remove the CheckboxSelectionModel from user controls grid, the user control loads fine in container page. I have used the similer concept with ext version 1.3, but finding there is something changed in implementation of user controls with version 2.0. Any idea what that is?

Thank you

[reezvi]

Well, could resolve the problem. But I have a question. In version 1.3 or before, we were able to register user controls in markup and could use the user controls tag prefix inside <Content> of any container to implement that user control. Now it seems that we have to use UserControlLoader. Is there anyway I can register and use user control tag prefix to implement a user control than using UserControlLoader?

Appreciate any answer. Thanks.