Eclipse plugin-problem

Hello
after updating Vaadin plugin for Eclipse, it practicaly stopped to work. In any operation I get following error:

java.lang.NoClassDefFoundError: org/apache/ivyde/eclipse/cp/IvyClasspathContainerHelper
    at com.vaadin.integration.eclipse.util.VaadinPluginUtil.getProjectBaseClasspath(VaadinPluginUtil.java:790)
    at com.vaadin.integration.eclipse.util.WidgetsetUtil.buildCommonArgs(WidgetsetUtil.java:402)
    at com.vaadin.integration.eclipse.builder.AddonStylesImporter.run(AddonStylesImporter.java:67)
    at com.vaadin.integration.eclipse.builder.AddonStylesBuilder.run(AddonStylesBuilder.java:79)
    at com.vaadin.integration.eclipse.builder.AddonStylesBuilder.access$1(AddonStylesBuilder.java:71)
    at com.vaadin.integration.eclipse.builder.AddonStylesBuilder$AddonStyleDeltaVisitor.visit(AddonStylesBuilder.java:47)
    at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:69)
    at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:80)
    at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:80)
    at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:49)
    at com.vaadin.integration.eclipse.builder.AddonStylesBuilder.build(AddonStylesBuilder.java:65)
    at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:733)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
    at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
    at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
    at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
    at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
    at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
Caused by: java.lang.ClassNotFoundException: org.apache.ivyde.eclipse.cp.IvyClasspathContainerHelper cannot be found by com.vaadin.integration.eclipse_2.2.0.201312051010
    at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:501)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:421)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:412)
    at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 23 more
Eclipse Java EE IDE for Web Developers.

Version: Kepler Service Release 1
Build id: 20130919-0819

Try updating also IvyDE.

Thanks :-). It seems to work now.
BTW Why it is possible to install Vaadin plugin with incompatible IvyIDE?

If I remember correctly, IvyDE changed some (not fully public but necessary for this use) API between an alpha/beta version and the final version with the same version number. Thus, Eclipse version number dependencies don’t help to differentiate between them and the Vaadin plug-in can only be compatible with one or the other.