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java.lang.NullPointerException: 	at org.springframework.roo.addon.gwt.GwtMetadata.resolveEntityInformation(GwtMetadata.java:126)	at org.springframework.roo.addon.gwt.GwtMetadata.(GwtMetadata.java:99)	at org.springframework.roo.addon.gwt.GwtMetadataProvider.get(GwtMetadataProvider.java:131)	at org.springframework.roo.metadata.DefaultMetadataService.get(DefaultMetadataService.java:139)	at org.springframework.roo.metadata.DefaultMetadataService.get(DefaultMetadataService.java:159)	at org.springframework.roo.addon.gwt.GwtOperationsImpl.setupGwt(GwtOperationsImpl.java:140)	at org.springframework.roo.addon.gwt.GwtCommands.installSecurity(GwtCommands.java:28)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.springframework.roo.support.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:191)	at org.springframework.roo.process.manager.ProcessManagerHostedExecutionStrategy$1.callback(ProcessManagerHostedExecutionStrategy.java:49)	at org.springframework.roo.process.manager.internal.DefaultProcessManager.doTransactionally(DefaultProcessManager.java:177)	at org.springframework.roo.process.manager.internal.DefaultProcessManager.execute(DefaultProcessManager.java:140)	at org.springframework.roo.process.manager.ProcessManagerHostedExecutionStrategy.execute(ProcessManagerHostedExecutionStrategy.java:47)	at org.springframework.roo.shell.AbstractShell.executeCommand(AbstractShell.java:159)	at org.springframework.roo.shell.jline.JLineShell.promptLoop(JLineShell.java:324)	at org.springframework.roo.shell.jline.JLineShell.run(JLineShell.java:117)	at java.lang.Thread.run(Thread.java:619)