Hello,
I get a null pointer Exception in Slot.onBrowserEvent(Slot.java:713) because icon variable is null. Slots are added dynamically so how can I fix the problem.
00:00:44,828 [ERROR]
Thu Feb 05 10:15:23 CET 2015 com.vaadin.client.ApplicationConfiguration
SEVERE: null
java.lang.NullPointerException: null at com.vaadin.client.ui.orderedlayout.Slot.onBrowserEvent(Slot.java:713) at com.google.gwt.user.client.DOM.dispatchEventImpl(DOM.java:1467) at com.google.gwt.user.client.DOM.dispatchEvent(DOM.java:1406) at com.google.gwt.user.client.impl.DOMImplStandard.dispatchEvent(DOMImplStandard.java:323) at com.google.gwt.user.client.impl.DOMImplStandard.dispatchUnhandledEvent(DOMImplStandard.java:343) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103) at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:72) at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172) at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:341) at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:222) at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:137) at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:589) at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:293) at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:104) at com.google.gwt.core.client.impl.Impl.apply(Impl.java) at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:353) at sun.reflect.GeneratedMethodAccessor58.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103) at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:72) at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172) at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:296) at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:551) at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:368) at java.lang.Thread.run(Unknown Source)