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first of all I am sorry on my English. I have a problem in my gwt application. the project not running on browser. It happened to me once more again, I can not run the project on a browser. It stopped working on the browser and then I decided to install a new browser (chrome). installed chrome and everything was excellent for a couple weeks and then it happened to me also in chrome it stopped working. I tried to delete the Firefox and chrome and reinstall it did not help. I tried all possible helped me in this url: gwt application stopped running suddenly and it did not help. In addition the project work well in my friend so no problem in code. What else can I do I've staffed Thanks to all helpers thank you

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  • Is there any exception/error logged? – Braj Mar 05 '14 at 11:54
  • As per your comments its working fine after installing a new browser i.e. there is some issue with browser cache. Clear browser cache before running your application or delete temp data stored under your file system. – Braj Mar 05 '14 at 11:56
  • no exception or error in log. I cleared history in browser but is not helped me I try to remove the browser and reinstall and is no helped me and I deleted all data in file system and is not helped – user2320349 Mar 05 '14 at 14:07
  • Delete gwt-unitCache, generated javascript and WEB-INF/deploy folders. GWT Compile then run the application again. – Braj Mar 05 '14 at 14:19
  • no is not helped to me – user2320349 Mar 05 '14 at 14:45
  • Ok I deleted eclipse and reinstall eclipse with gwt plug in and now when I run my project I get this error how I can solve it. org.datanucleus.plugin.NonManagedPluginRegistry registerExtensions WARNING: Extension Point "org.eclipse.core.runtime.preferences" not registered, but plugin "" defined in file:c:/location/gwt-dev.jar refers to it. DataNucleus Enhancer (version 1.1.4) : Enhancement of classes DataNucleus Enhancer completed with success for 13 classes. Timings : input=190 ms, enhance=44 ms, total=234 ms. Consult the log for full details – user2320349 Mar 06 '14 at 17:36
  • delete c:/location/gwt-dev.jar file. Access it from GWT sdk plugin (com.google.gwt.eclipse.sdkbundle). Turn off [DataNucleus Enhancer](http://stackoverflow.com/questions/1015727/how-to-turn-off-datanucleus-enhancer-while-working-with-google-app-engine). – Braj Mar 06 '14 at 17:53
  • but is the same location the full path of gwt plug in is "C:\Users\Gal lavie\Desktop\eclipse\eclipse\plugins\com.google.gwt.eclipse.sdkbundle_2.6.0\gwt-2.6.0\gwt-dev.jar" and the full path of error is "C:/Users/Gal%20lavie/Desktop/eclipse/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.6.0/gwt-2.6.0/gwt-dev.jar" – user2320349 Mar 06 '14 at 18:00
  • Turn off DataNucleus Enhancer or Reconfigure GWT SDK in eclipse. – Braj Mar 06 '14 at 18:03
  • Click [here](http://stackoverflow.com/questions/1015727/how-to-turn-off-datanucleus-enhancer-while-working-with-google-app-engine) – Braj Mar 06 '14 at 18:24
  • It was a good set src/com/lebsh/floor/server/jdo/ – user2320349 Mar 06 '14 at 18:31
  • Ok I noticed the generated folder under var folder not created. someone know why the folder not created I think this is the problem – user2320349 Mar 09 '14 at 16:43
  • is GWT compilation working fine? – Braj Mar 09 '14 at 16:57
  • yes project compiled successfully – user2320349 Mar 09 '14 at 17:41
  • You have to define WAR directory while compiling the project. Try- war argument. – Braj Mar 09 '14 at 17:46
  • What do you mean I do not understand – user2320349 Mar 09 '14 at 17:59
  • I not know how but it work now I did reinstall to chrome and suddenly it work. but now I have another problem I get this error in server side. java.lang.NoClassDefFoundError: com/google/gwt/core/client/GWTBridge I not know why – user2320349 Mar 11 '14 at 04:51

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