org.eclipse.core.internal.resources.ResourceException: Resource '/conferences/src/main/java/org/conferences/model/Session.java' does not exist.
	at org.eclipse.core.internal.resources.Resource.checkExists(Resource.java:341)
	at org.eclipse.core.internal.resources.Resource.checkAccessible(Resource.java:215)
	at org.eclipse.core.internal.resources.Resource.findMaxProblemSeverity(Resource.java:1051)
	at org.eclipse.jdt.ui.ProblemsLabelDecorator.getPackageErrorTicksFromMarkers(ProblemsLabelDecorator.java:337)
	at org.eclipse.jdt.ui.ProblemsLabelDecorator.computeAdornmentFlags(ProblemsLabelDecorator.java:212)
	at org.eclipse.jdt.internal.ui.viewsupport.TreeHierarchyLayoutProblemsDecorator.computePackageAdornmentFlags(TreeHierarchyLayoutProblemsDecorator.java:47)
	at org.eclipse.jdt.internal.ui.viewsupport.TreeHierarchyLayoutProblemsDecorator.computeAdornmentFlags(TreeHierarchyLayoutProblemsDecorator.java:56)
	at org.eclipse.jdt.internal.ui.packageview.PackageExplorerProblemsDecorator.computeAdornmentFlags(PackageExplorerProblemsDecorator.java:35)
	at org.eclipse.jdt.ui.ProblemsLabelDecorator.decorateImage(ProblemsLabelDecorator.java:170)
	at org.eclipse.jdt.internal.ui.viewsupport.JavaUILabelProvider.decorateImage(JavaUILabelProvider.java:134)
	at org.eclipse.jdt.internal.ui.viewsupport.JavaUILabelProvider.getImage(JavaUILabelProvider.java:149)
	at org.eclipse.jdt.internal.ui.packageview.PackageExplorerLabelProvider.getImage(PackageExplorerLabelProvider.java:140)
	at org.eclipse.jdt.internal.ui.navigator.JavaNavigatorLabelProvider.getImage(JavaNavigatorLabelProvider.java:128)
	at org.eclipse.ui.internal.navigator.NavigatorContentServiceLabelProvider.findImage(NavigatorContentServiceLabelProvider.java:197)
	at org.eclipse.ui.internal.navigator.NavigatorContentServiceLabelProvider.getColumnImage(NavigatorContentServiceLabelProvider.java:105)
	at org.eclipse.ui.internal.navigator.NavigatorContentServiceLabelProvider.getImage(NavigatorContentServiceLabelProvider.java:98)
	at org.eclipse.ui.internal.navigator.NavigatorDecoratingLabelProvider$StyledLabelProviderAdapter.getImage(NavigatorDecoratingLabelProvider.java:59)
	at org.eclipse.jface.viewers.DelegatingStyledCellLabelProvider.getImage(DelegatingStyledCellLabelProvider.java:195)
	at org.eclipse.jface.viewers.DecoratingStyledCellLabelProvider.getImage(DecoratingStyledCellLabelProvider.java:173)
	at org.eclipse.ui.navigator.CommonNavigatorManager.updateStatusBar(CommonNavigatorManager.java:308)
	at org.eclipse.ui.navigator.CommonNavigatorManager$1.selectionChanged(CommonNavigatorManager.java:74)
	at org.eclipse.jface.viewers.StructuredViewer$3.run(StructuredViewer.java:876)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:178)
	at org.eclipse.jface.viewers.StructuredViewer.firePostSelectionChanged(StructuredViewer.java:873)
	at org.eclipse.jface.viewers.StructuredViewer.setSelection(StructuredViewer.java:1708)
	at org.eclipse.jface.viewers.TreeViewer.setSelection(TreeViewer.java:1093)
	at org.eclipse.ui.navigator.CommonViewer.setSelection(CommonViewer.java:375)
	at org.eclipse.ui.navigator.CommonNavigator.selectReveal(CommonNavigator.java:383)
	at org.jboss.tools.forge.ui.internal.cli.CommandLineListener.expandInProjectExplorer(CommandLineListener.java:217)
	at org.jboss.tools.forge.ui.internal.cli.CommandLineListener.expandWorkspaceResource(CommandLineListener.java:191)
	at org.jboss.tools.forge.ui.internal.cli.CommandLineListener.selectFile(CommandLineListener.java:175)
	at org.jboss.tools.forge.ui.internal.cli.CommandLineListener.selectResource(CommandLineListener.java:136)
	at org.jboss.tools.forge.ui.internal.cli.CommandLineListener.access$5(CommandLineListener.java:133)
	at org.jboss.tools.forge.ui.internal.cli.CommandLineListener$1.run(CommandLineListener.java:99)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:136)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3983)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3660)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1465)