How to run GWTP Project?

When I try to run a sample project from GWTP Repo after import it to eclipse and run it as GWT Project, when access to the page, this show up:

To launch an application, specify a URL of the form /module/file.html

I wonder what开发者_Go百科 is the problem with my setup here.

Thank you very much.

Try to add GWT SDK Library in the classpath of the project (Eclipse -> right click on the project ->Properties -> Libraries tab -> Add Library) and then by Order and Export tab move the GWT SDK Library on Top (press Top button).