/Users/luca/Documents/University/PhD/FODA/.metadata/.plugins/org.eclipse.pde.core/temp/org.eclipse.pde.container.feature/compile.org.eclipse.pde.container.feature.xml:4: The following error occurred while executing this line: /Users/luca/Documents/University/PhD/FODA/it.unibg.robotics.featuremodels.model/build.xml:31: /Library/Java/JavaVirtualMachines/jdk1.7.0_07.jdk/Contents/Home/Classes does not exist. The following error occurred while executing this line: /Users/luca/Documents/University/PhD/FODA/it.unibg.robotics.featuremodels.model/build.xml:31: /Library/Java/JavaVirtualMachines/jdk1.7.0_07.jdk/Contents/Home/Classes does not exist.