The project XXX does not have any GWT SDKs on its build path

Question

Sometimes, when I start Eclipse (Java EE IDE for Web Developers, Indigo SR 1) on my MacOSX Lion, my GWT (2.4.0) project initially fails to compile<

Answer 1

Also an other soulutin is to move the GWT SDK to the top of the Library list(right after your project) on the Properties/Java Build Path/Order and Export page.