The activator for bundle is invalid

Question

I\'m trying to create a simple plugin in eclipse. When I run the application, I see this error in log file:

org.osgi.framework.BundleException : The a

Answer 1

Another captain obvious: If you change the paths of your source files (e.g. src/ to src/main/java), but forget to update build.properties, the compilation will always succeed, but your plugin will never work.