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java.lang.ClassNotFoundException: y.io.IOHandler	at com.intellij.util.lang.UrlClassLoader.findClass(UrlClassLoader.java:214)	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)	at java.lang.ClassLoader.defineClass1(Native Method)	at java.lang.ClassLoader.defineClass(ClassLoader.java:760)	at java.lang.ClassLoader.defineClass(ClassLoader.java:642)	at com.intellij.util.lang.UrlClassLoader._defineClass(UrlClassLoader.java:268)	at com.intellij.util.lang.UrlClassLoader.defineClass(UrlClassLoader.java:264)	at com.intellij.util.lang.UrlClassLoader.findClass(UrlClassLoader.java:218)	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:348)	at com.intellij.openapi.components.impl.ServiceManagerImpl$MyComponentAdapter.a(ServiceManagerImpl.java:260)	at com.intellij.openapi.components.impl.ServiceManagerImpl$MyComponentAdapter.getComponentInstance(ServiceManagerImpl.java:222)	at com.intellij.util.pico.DefaultPicoContainer.getLocalInstance(DefaultPicoContainer.java:246)	at com.intellij.util.pico.DefaultPicoContainer.getComponentInstance(DefaultPicoContainer.java:212)	at com.intellij.openapi.components.ServiceManager.doGetService(ServiceManager.java:46)	at com.intellij.openapi.components.ServiceManager.getService(ServiceManager.java:37)	at com.intellij.openapi.graph.GraphSvgExporter.getGraphSvgExporter(GraphSvgExporter.java:26)	at com.intellij.openapi.graph.builder.actions.export.ExportToFileAction.actionPerformed(ExportToFileAction.java:87)	at com.intellij.openapi.graph.builder.actions.AbstractGraphAction.actionPerformed(AbstractGraphAction.java:87)	at com.intellij.uml.core.actions.StandardGraphActionsWrapper.perform(StandardGraphActionsWrapper.java:34)	at com.intellij.diagram.DiagramAction.actionPerformed(DiagramAction.java:123)	at com.intellij.openapi.actionSystem.ex.ActionUtil$1.run(ActionUtil.java:197)	at com.intellij.openapi.application.TransactionGuardImpl.a(TransactionGuardImpl.java:88)	at com.intellij.openapi.application.TransactionGuardImpl.submitTransactionAndWait(TransactionGuardImpl.java:156)	at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:211)	at com.intellij.openapi.actionSystem.impl.ActionButton.a(ActionButton.java:188)	at com.intellij.openapi.actionSystem.impl.ActionButton.a(ActionButton.java:154)	at com.intellij.openapi.actionSystem.impl.ActionButton.processMouseEvent(ActionButton.java:325)	at java.awt.Component.processEvent(Component.java:6298)	at java.awt.Container.processEvent(Container.java:2236)	at java.awt.Component.dispatchEventImpl(Component.java:4889)	at java.awt.Container.dispatchEventImpl(Container.java:2294)	at java.awt.Component.dispatchEvent(Component.java:4711)	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)	at java.awt.Container.dispatchEventImpl(Container.java:2280)	at java.awt.Window.dispatchEventImpl(Window.java:2746)	at java.awt.Component.dispatchEvent(Component.java:4711)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)	at java.awt.EventQueue.access$500(EventQueue.java:97)	at java.awt.EventQueue$3.run(EventQueue.java:709)	at java.awt.EventQueue$3.run(EventQueue.java:703)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)	at java.awt.EventQueue$4.run(EventQueue.java:731)	at java.awt.EventQueue$4.run(EventQueue.java:729)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)	at com.intellij.ide.IdeEventQueue.f(IdeEventQueue.java:863)	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:695)	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:385)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)