关闭时生成以下异常关系eer图表的选项卡：

system.nullReferenceException：Referênciade objetonãoimedidapara umainstânciadeum objeto。Em mysql.gui.workbench.mainform.maindockpanel_activedocumentcluld（optodocumentclosentargs e）em weifenluo.winformsui.docking.dockpanel.onActivedocumentClosing（ActivedocumentCloseneVenta RGS e）em weifenluo.winformsui.docking.dockpane.closecontent（iDockContent内容）EM Weifenluo.Winformsui.docking.dockpane.closeaglivecontent（）em weifenluo.winformsui.docking.vs2005dockpanestrip.close_click（object sender，enceargs e）em system.windows.forms.control.onclick（eventargs e）em system.windows.forms.control.wmmerouseup（Message＆M，MouseButtons按钮，Int32 Clicks）EM System.Windows.Forms.Control.wndproc（message＆m）em system.windows.forms.control.controlnativewindow.onmessage（message＆m）em system.windows.forms.control.controlnationwindow。wndproc（message＆m）em system.windows.forms.nativewindow.callback（intptr hwnd，int32 msg，intptr wparam，intptr lparam）

（bug＃47958）

尝试运行MySQL工作台时，出现了Splash屏幕，然后应用程序立即崩溃，生成“将错误报告发送到Microsoft“对话。在调试时发现MySQL工作台扔了一个TypeLoadException：

无法加载类型' weifenlu.winformsui . docking。ActivedocumentCloseneVentargs.' from assembly 'WeifenLuo.WinFormsUI.Docking, Version=2.2.3428.40956, Culture=neutral, PublicKeyToken=null'.

在检查参考组件时，证实没有类型ActivedocumentCloseneVentargs.定义。（bug＃47534，bug＃47480）