===== Vaadin Eclipse Widgetset Compilation ===== INFORMATION: Requested resource [/VAADIN/widgetsets/org.test.MyAppWidgetset/org.test.MyAppWidgetset.nocache.js] not found from filesystem or through class loader. Add widgetset and/or theme JAR to your classpath or add files to WebContent/VAADIN folder. \\ \\ I run into this problem some time ago. I read thousands answers to this topic but never found something that helped. Then I noticed that if you run tomcat as an adapter in eclipse and you deploy your project into it, then sometimes after you have build your project, the **target folder is not in sync** with eclipse and **you have to press F5 on it**. After this action the widgetset could be loaded. ~~DISQUS~~