打开IBM MQ资源管理器时出错。它以前工作得很好，但突然停止了工作，我不明白这个错误，你们能帮忙吗？
打开时显示Error creating the view.
以下是错误：
java.lang.NoClassDefFoundError: org.eclipse.core.resources.IProjectDescription
at java.lang.J9VMInternals.verifyImpl(Native Method)
at java.lang.J9VMInternals.verify(J9VMInternals.java:66)
at java.lang.J9VMInternals.initialize(J9VMInternals.java:127)
at com.ibm.mq.explorer.tests.Notify.pluginEnabled(Notify.java:96)
at com.ibm.mq.explorer.ui.internal.base.NotificationManager.notifyPluginEnabled(NotificationManager.java:869)
at com.ibm.mq.explorer.ui.internal.base.UiPlugin.sendPluginEnablementEvents(UiPlugin.java:2483)
at com.ibm.mq.explorer.ui.internal.base.UiPlugin.addNavigatorView(UiPlugin.java:1574)
at com.ibm.mq.explorer.ui.internal.views.MQNavigatorView.createPartControl(MQNavigatorView.java:296)
at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:370)
at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:227)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:592)
at org.eclipse.ui.internal.WorkbenchPage$ActivationList.setActive(WorkbenchPage.java:4080)
at org.eclipse.ui.internal.WorkbenchPage$17.runWithException(WorkbenchPage.java:3145)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:123)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3659)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3296)
at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:801)
at org.eclipse.ui.internal.Workbench$25.runWithException(Workbench.java:1342)
at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:123)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3659)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3296)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2309)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)
at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at com.ibm.mq.explorer.ui.rcp.internal.base.RcpApplication.run(RcpApplication.java:145)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:615)
at org.eclipse.equinox.internal.app.EclipseAppContainer.callMethod(EclipseAppContainer.java:572)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:171)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:615)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:508)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447)
at org.eclipse.equinox.launcher.Main.run(Main.java:1173)
at org.eclipse.equinox.launcher.Main.main(Main.java:1148)
如果它以前工作，而现在不工作，正如Morag所建议的，则表明发生了变化。
NoClassDefFoundError错误表示Java类路径不再指向所需的.class/.jar文件。
错误堆栈表明您正在Eclipse上使用MQ资源管理器连接到MQ服务器。您没有找到Eclipse类org.eclipse.core.resources.IProjectDescription，这表明您的Eclipse环境已经损坏。您是否在机器上升级了Eclipse或Java？
IMHO你的标题是误导性的，因为它应该读作"；无法启动MQ资源管理器"；。
粘贴的错误看起来像是MQ资源管理器，而不是MQ服务器。尝试使用命令行命令来处理MQ。如果那里的情况看起来不错，那么肯定是因为库中缺少了一些jar。还要试着回忆一下你最近是否改变了什么。