org.eclipse.jface.util.Assert$AssertionFailedException: Assertion failed:

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org.eclipse.jface.util.Assert$AssertionFailedException: Assertion failed:
at org.eclipse.jface.util.Assert.isTrue(Assert.java:168)
at org.eclipse.ui.part.MultiPageEditorPart.setActivePage(MultiPageEditorPart.java:497)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:616)
at org.eclipse.ui.internal.PartPane.createChildControl(PartPane.java:133)
at org.eclipse.ui.internal.PartPane.createControl(PartPane.java:205)
at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:939)
at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:921)
at org.eclipse.ui.internal.EditorStack.setSelection(EditorStack.java:196)
at org.eclipse.ui.internal.EditorStack.setVisibleEditor(EditorStack.java:200)
at org.eclipse.ui.internal.EditorAreaHelper.setVisibleEditor(EditorAreaHelper.java:338)
at org.eclipse.ui.internal.EditorAreaHelper.openEditor(EditorAreaHelper.java:268)
at org.eclipse.ui.internal.EditorManager.createEditorTab(EditorManager.java:683)
at org.eclipse.ui.internal.EditorManager.openInternalEditor(EditorManager.java:779)
at org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:582)
at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:570)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2244)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2177)
at org.eclipse.ui.internal.WorkbenchPage.access$6(WorkbenchPage.java:2169)
at org.eclipse.ui.internal.WorkbenchPage$9.run(WorkbenchPage.java:2156)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:137)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:110)
at org.eclipse.jdt.internal.ui.actions.OpenActionUtil.open(OpenActionUtil.java:49)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:164)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:150)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:212)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:188)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:289)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:616)
at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:427)
at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:635)
at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:731)
at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:211)
at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:206)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:796)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2772)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1377)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1348)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:141)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:273)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at org.eclipse.core.launcher.Main.basicRun(Main.java:185)
at org.eclipse.core.launcher.Main.run(Main.java:704)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at com.m7.installer.util.NitroxMain$1.run(NitroxMain.java:28)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

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