апр 13, 2017 12:56:39 PM com.vaadin.server.DefaultErrorHandler doDefault
SEVERE:
java.lang.IllegalStateException: Moving an extension from one parent to another is not supported
        at com.vaadin.server.AbstractClientConnector.addExtension(AbstractClientConnector.java:581)
        at com.vaadin.server.AbstractExtension.extend(AbstractExtension.java:77)
        at com.vaadin.server.BrowserWindowOpener.extend(BrowserWindowOpener.java:125)
        at ru.hrs.lassd.club.vaadin.views.PosView.funcButton(PosView.java:362)
        at ru.hrs.lassd.club.vaadin.views.PosView.makeFuncLayout(PosView.java:1547)
        at ru.hrs.lassd.club.vaadin.views.PosView.attach(PosView.java:2044)
        at com.vaadin.ui.AbstractComponent.setParent(AbstractComponent.java:582)
        at com.vaadin.ui.AbstractComponentContainer.addComponent(AbstractComponentContainer.java:210)
        at com.vaadin.ui.TabSheet.addTab(TabSheet.java:403)
        at com.vaadin.ui.TabSheet.addTab(TabSheet.java:355)
        at ru.hrs.lassd.club.vaadin.RootUI.openTab(RootUI.java:475)
        at ru.hrs.lassd.club.vaadin.RootUI.lambda$viewButton$4483a223$1(RootUI.java:444)
        at sun.reflect.GeneratedMethodAccessor96.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:508)
        at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:198)
        at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:161)
        at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:1008)
        at com.vaadin.ui.Button.fireClick(Button.java:377)