The Nokia Qt SDK will only launch QMLViewer if you actually add a version of Qt that is 4.7. In Creator, go to “Tools > Options > Qt4” and add your version of Qt 4.7.x there. Also make sure this version of Qt is active for your QML project.

There is an Auto Detected path Qt in Path which is not found by the creator. However, the options doesn’t allow me to modify it. I tried adding a new manual path pointing to Qt SDK but still the project doesn’t show any option to set it.