Hi I am having a similar problem using the same versions of GWT and gwtwidgets, trying to show() a Lightbox object :
[ERROR] Uncaught exception escaped java.lang.AssertionError: Element may only be set once at com.google.gwt.user.client.ui.UIObject.setElement(UIObject.java: 802) at org.gwtwidgets.client.ui.PNGImage.<init>(PNGImage.java:48) at org.gwtwidgets.client.ui.LightBox.show(LightBox.java:85) at org.bioversityinternational.cisf.client.panel.PassportPanel $2.onClick(PassportPanel.java:115) at com.google.gwt.user.client.ui.ClickListenerCollection.fireClick(ClickListenerCollection.java: 34) at com.google.gwt.user.client.ui.Image.onBrowserEvent(Image.java:484) at com.google.gwt.user.client.DOM.dispatchEventImpl(DOM.java:1308) at com.google.gwt.user.client.DOM.dispatchEventAndCatch(DOM.java: 1287) at com.google.gwt.user.client.DOM.dispatchEvent(DOM.java:1255) at sun.reflect.GeneratedMethodAccessor32.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java: 25) at java.lang.reflect.Method.invoke(Method.java:585) at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java: 103) at com.google.gwt.dev.shell.ie.IDispatchImpl.callMethod(IDispatchImpl.java: 126) at com.google.gwt.dev.shell.ie.IDispatchProxy.invoke(IDispatchProxy.java: 155) at com.google.gwt.dev.shell.ie.IDispatchImpl.Invoke(IDispatchImpl.java: 294) at com.google.gwt.dev.shell.ie.IDispatchImpl.method6(IDispatchImpl.java: 194) at org.eclipse.swt.internal.ole.win32.COMObject.callback6(COMObject.java: 117) at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1925) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2966) at com.google.gwt.dev.GWTShell.pumpEventLoop(GWTShell.java:720) at com.google.gwt.dev.GWTShell.run(GWTShell.java:593) at com.google.gwt.dev.GWTShell.main(GWTShell.java:357) I found this note http://code.google.com/p/bunsenandbeaker/wiki/FAQ_AssertionElementMayOnlyBeSetOnce which gives an idea of what's happening, but still keeps us stuck since it's not our own code that's causing the problem. If there's a bug in gwtwidgets 0.2.0, is there any workaround for it? Thanks in advance. On Sep 15, 10:39 am, browndar <[EMAIL PROTECTED]> wrote: > Hi Folks, > > I recently upgraded to the GWT 1.5.2. Now, I can deploy just fine to > a war, but am having some difficulties in hosted mode. It seems to be > related with the gwt-widgets library (version 0.2.0). When I try to > create an image button, I get this: > > [ERROR] Uncaught exception escaped > java.lang.AssertionError:Element may only be set once > at com.google.gwt.user.client.ui.UIObject.setElement(UIObject.java: > 802) > at org.gwtwidgets.client.ui.PNGImage.<init>(PNGImage.java:48) > at org.gwtwidgets.client.ui.ImageButton.<init>(ImageButton.java:63) > at > com.intime.client.widget.PagedMiniStripWidget.<init>(PagedMiniStripWidget.java: > 54) > at > com.intime.client.page.CompletedStripsPage.<init>(CompletedStripsPage.java: > 81) > at com.intime.client.Controller.init(Controller.java:243) > at com.intime.client.Controller.resultConfig(Controller.java:222) > at com.intime.client.service.ConfigProvider > $ConfigCallBack.onSuccess(ConfigProvider.java:49) > at > com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter.onResponseReceived(RequestCallbackAdapter.java: > 215) > at > com.google.gwt.http.client.Request.fireOnResponseReceivedImpl(Request.java: > 254) > at > com.google.gwt.http.client.Request.fireOnResponseReceivedAndCatch(Request.java: > 226) > at > com.google.gwt.http.client.Request.fireOnResponseReceived(Request.java: > 217) > 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 com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java: > 103) > at > com.google.gwt.dev.shell.moz.MethodDispatch.invoke(MethodDispatch.java: > 80) > at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native > Method) > at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java: > 1428) > at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2840) > at com.google.gwt.dev.GWTShell.pumpEventLoop(GWTShell.java:720) > at com.google.gwt.dev.GWTShell.run(GWTShell.java:593) > at com.google.gwt.dev.GWTShell.main(GWTShell.java:357) > > Has anyone else come across this? > > Thanks very much, > > Darren --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~----------~----~----~----~------~----~------~--~---