I have an error I've been seeing in the production logs for awhile now and 
haven't been able to to figure it out.

My thought is that it is due to a stale page or the back button, but it seems 
to me that it is happening alot, so I thought I might inquire.

Any thoughts on what might be causing this and how to avoid it?

2010-11-26 08:36:36,676 ERROR [TP-Processor34] wicket.RequestCycle - Submit 
Button add (path=dataPanel:contentCenterBox:addUserForm:add) is not visible
org.apache.wicket.WicketRuntimeException: Submit Button add 
(path=dataPanel:contentCenterBox:addUserForm:add) is not visible
        at org.apache.wicket.markup.html.form.Form$2.component(Form.java:622)
        at 
org.apache.wicket.MarkupContainer.visitChildren(MarkupContainer.java:899)
        at 
org.apache.wicket.MarkupContainer.visitChildren(MarkupContainer.java:914)
        at 
org.apache.wicket.MarkupContainer.visitChildren(MarkupContainer.java:914)
        at 
org.apache.wicket.MarkupContainer.visitChildren(MarkupContainer.java:914)
        at 
org.apache.wicket.markup.html.form.Form.findSubmittingButton(Form.java:604)
        at 
org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:899)
        at 
org.apache.wicket.ajax.form.AjaxFormSubmitBehavior.onEvent(AjaxFormSubmitBehavior.java:135)
        at 
org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:177)
        at 
org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:300)
        at 
org.apache.wicket.request.target.component.listener.BehaviorRequestTarget.processEvents(BehaviorRequestTarget.java:119)
        at 
org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92)
        at 
org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1250)
        at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329)
        at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1436)
        at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
        at 
org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:484)
        at 
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:317)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
        at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
        at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
        at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
        at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
        at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283)
        at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:773)
        at 
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703)
        at 
org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:895)
        at 
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
        at java.lang.Thread.run(Unknown Source)


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