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ERROR c.e.m.w.DesktopApplication:202 - Error

com.vaadin.server.ServerRpcManager$RpcInvocationException: Unable to invoke method click in com.vaadin.shared.ui.button.ButtonServerRpc

at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:160) ~[vaadin-server-7.5.0.jar:7.5.0]

at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:118) ~[vaadin-server-7.5.0.jar:7.5.0]

at com.vaadin.server.communication.ServerRpcHandler.handleInvocations(ServerRpcHandler.java:313) [vaadin-server-7.5.0.jar:7.5.0]

at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:202) [vaadin-server-7.5.0.jar:7.5.0]

at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:95) [vaadin-server-7.5.0.jar:7.5.0]

at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:41) [vaadin-server-7.5.0.jar:7.5.0]

at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1408) [vaadin-server-7.5.0.jar:7.5.0]

at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:350) [vaadin-server-7.5.0.jar:7.5.0]

at com.vaadin.addon.touchkit.server.TouchKitServlet.service(TouchKitServlet.java:63) [vaadin-touchkit-agpl-4.0.2.jar:4.0.2]

at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [javax.servlet-api-3.1.0.jar:3.1.0]

at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:816) [jetty-servlet-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1684) [jetty-servlet-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:45) [jetty-servlets-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1667) [jetty-servlet-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581) [jetty-servlet-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) [jetty-server-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548) [jetty-security-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226) [jetty-server-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1121) [jetty-server-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511) [jetty-servlet-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) [jetty-server-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1055) [jetty-server-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) [jetty-server-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213) [jetty-server-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:118) [jetty-server-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.server.Server.handle(Server.java:515) [jetty-server-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:291) [jetty-server-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:242) [jetty-server-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:238) [jetty-io-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95) [jetty-io-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:57) [jetty-io-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:191) [jetty-util-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:126) [jetty-util-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654) [jetty-util-9.3.0.v20150612.jar:9.3.0.v20150612]

at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572) [jetty-util-9.3.0.v20150612.jar:9.3.0.v20150612]

at java.lang.Thread.run(Unknown Source) [na:1.8.0_45]

Caused by: java.lang.reflect.InvocationTargetException: null

at sun.reflect.GeneratedMethodAccessor160.invoke(Unknown Source) ~[na:na]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_45]

at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_45]

at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:158) ~[vaadin-server-7.5.0.jar:7.5.0]

... 35 common frames omitted

Caused by: com.vaadin.event.ListenerMethod$MethodException: Invocation of method buttonClick in com.esofthead.mycollab.module.file.view.components.ResourcesDisplayComponent$2 failed.

at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:528) ~[vaadin-server-7.5.0.jar:7.5.0]

at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:198) ~[vaadin-server-7.5.0.jar:7.5.0]

at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:161) ~[vaadin-server-7.5.0.jar:7.5.0]

at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:995) ~[vaadin-server-7.5.0.jar:7.5.0]

at com.vaadin.ui.Button.fireClick(Button.java:393) ~[vaadin-server-7.5.0.jar:7.5.0]

at com.vaadin.ui.Button$1.click(Button.java:61) ~[vaadin-server-7.5.0.jar:7.5.0]

... 39 common frames omitted

Caused by: java.lang.NullPointerException: null

at com.esofthead.mycollab.module.file.view.components.ResourcesDisplayComponent$2.buttonClick(ResourcesDisplayComponent.java:154) ~[mycollab-web-5.0.10.jar:na]

at sun.reflect.GeneratedMethodAccessor161.invoke(Unknown Source) ~[na:na]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_45]

at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_45]

at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:508) ~[vaadin-server-7.5.0.jar:7.5.0]

... 44 common frames omitted