The solution if you want to use a database connection ( MySQL for example) :
1 - You can't use google app engine mode (enable by default on Eclipse with GWT plugin) : To disable the google App mode : right click on the project > Google > App setting engine > uncheck "use google app engine" 2 - Remove all JAR linked to AppEngine (the name contain "appengine") from you project classpath 3- Be careful some warning will appear to say that some jar are missing in the WAR/lib directory, copy them. Thanks a lot for your help (especially Juan !) -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/ph837XrVxKkJ. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.