While developing Custom Modules in DotNetNuke, there comes a time where you need to debug your modules, or specific user controls.
You can download the dnndebug.aspx page from the following link:
All you need to do is place this aspx page in the root of your DNN installation, and give it the full path of the control you want to debug as follow:
It will parse the user control, and display for you the errors generated by this usercontrol.
Hope this helps you identify your errors and make your DNN development easier.