[#6586] - Expression Editor does not work

Hi the problem seems related to some Xtext dependency.
We fixed a plugin manifest and a feature configuration. Next integration build will work fine.
In the meanwhile a possible workaround is to install the Xtext SDK from the Help > Install new software.
Another solution, would be to manually replace in the plugins folder of your Eclipse installation the com.jaspersoft.studio.editor.jrexpressions_6.2.0.final.jar file overwriting the old one with the updated one here: https://sourceforge.net/projects/jasperstudio/files/updatesite/6.2.0/plu...
We replaced today the files of the update site in order to silently fix the issue for upcoming 6.2.0 users. In this case please be sure to restart your Eclipse with the -clean flag.

Regards,
Massimo.

But with an update to 6.2.2 it seems to have come back :-(
The stack trace looks a bit different though:

!ENTRY org.eclipse.ui 4 0 2016-05-13 08:39:47.958
!MESSAGE Unhandled event loop exception
!STACK 0
java.lang.NoClassDefFoundError: org/eclipse/xtext/ui/shared/SharedStateModule
at com.jaspersoft.studio.editor.jrexpressions.ui.JRExpressionsActivator.getSharedStateModule(JRExpressionsActivator.java:104)
at com.jaspersoft.studio.editor.jrexpressions.ui.JRExpressionsActivator.createInjector(JRExpressionsActivator.java:76)
at com.jaspersoft.studio.editor.jrexpressions.ui.JRExpressionsActivator.getInjector(JRExpressionsActivator.java:67)
at com.jaspersoft.studio.editor.jrexpressions.ui.support.java.JavaExpressionEditorComposite.getInjector(JavaExpressionEditorComposite.java:324)
at com.jaspersoft.studio.editor.jrexpressions.ui.support.java.JavaExpressionEditorComposite.createEditorArea(JavaExpressionEditorComposite.java:228)
at com.jaspersoft.studio.editor.jrexpressions.ui.support.java.JavaExpressionEditorComposite.<init>(JavaExpressionEditorComposite.java:145)
at com.jaspersoft.studio.editor.jrexpressions.ui.support.java.JavaExpressionEditorSupport.createExpressionEditorComposite(JavaExpressionEditorSupport.java:45)
at com.jaspersoft.studio.property.descriptor.expression.dialog.JRExpressionPage.createControl(JRExpressionPage.java:91)
at org.eclipse.jface.wizard.Wizard.createPageControls(Wizard.java:175)
at org.eclipse.jface.wizard.WizardDialog.createPageControls(WizardDialog.java:705)
at org.eclipse.jface.wizard.WizardDialog.createContents(WizardDialog.java:597)
at org.eclipse.jface.window.Window.create(Window.java:430)
at org.eclipse.jface.dialogs.Dialog.create(Dialog.java:1096)
at org.eclipse.jface.window.Window.open(Window.java:792)
at com.jaspersoft.studio.swt.widgets.WTextExpression$3.widgetSelected(WTextExpression.java:220)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4362)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1113)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4180)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3769)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:694)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:606)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at com.jaspersoft.studio.rcp.intro.Application.start(Application.java:99)
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:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)
at org.eclipse.equinox.launcher.Main.run(Main.java:1515)
Caused by: java.lang.ClassNotFoundException: An error occurred while automatically activating bundle org.eclipse.xtext.ui.shared (714).
at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:116)
at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:531)
at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:324)
at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:327)
at org.eclipse.osgi.internal.loader.sources.SingleSourcePackage.loadClass(SingleSourcePackage.java:36)
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:398)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:352)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:344)
at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 42 more
Caused by: org.osgi.framework.BundleException: Exception in org.eclipse.xtext.ui.shared.internal.Activator.start() of bundle org.eclipse.xtext.ui.shared.
at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:792)
at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:721)
at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:941)
at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:318)
at org.eclipse.osgi.container.Module.doStart(Module.java:571)
at org.eclipse.osgi.container.Module.start(Module.java:439)
at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:454)
at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:107)
... 51 more
Caused by: java.lang.NoClassDefFoundError: org/eclipse/xtext/generator/trace/ITraceForStorageProvider
at org.eclipse.xtext.ui.shared.internal.SharedModule$2.configure(SharedModule.java:121)
at com.google.inject.PrivateModule.configure(PrivateModule.java:97)
at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:223)
at org.eclipse.xtext.ui.shared.internal.SharedModule.configure(SharedModule.java:117)
at com.google.inject.AbstractModule.configure(AbstractModule.java:59)
at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:223)
at com.google.inject.spi.Elements.getElements(Elements.java:101)
at com.google.inject.internal.InjectorShell$Builder.build(InjectorShell.java:133)
at com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCreator.java:103)
at com.google.inject.Guice.createInjector(Guice.java:95)
at com.google.inject.Guice.createInjector(Guice.java:72)
at com.google.inject.Guice.createInjector(Guice.java:62)
at org.eclipse.xtext.ui.shared.internal.Activator.initializeInjector(Activator.java:75)
at org.eclipse.xtext.ui.shared.internal.Activator.start(Activator.java:114)
at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:771)
at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:764)
... 58 more
Caused by: java.lang.ClassNotFoundException: org.eclipse.xtext.generator.trace.ITraceForStorageProvider cannot be found by org.eclipse.xtext.ui.shared_2.8.4.v201508050135
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:439)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:352)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:344)
at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 76 more