Removed cyclic dependency error after removing plugins

I removed some plugins in Servoy\application_server\plugins. After I started Servoy again, I got the following error.:

!ENTRY org.eclipse.ui 4 4 2013-11-27 08:31:37.811
!MESSAGE Removed cyclic dependency in the working set 'Aggregate for window 1385476209288'.

!ENTRY org.eclipse.ui.ide 4 4 2013-11-27 08:31:37.831
!MESSAGE Removed cyclic dependency in the working set 'Aggregate for window 1385476209288'.
!STACK 0
java.lang.IllegalStateException: Removed cyclic dependency in the working set 'Aggregate for window 1385476209288'.
	at org.eclipse.ui.internal.AggregateWorkingSet.constructElements(AggregateWorkingSet.java:96)
	at org.eclipse.ui.internal.AggregateWorkingSet.restoreWorkingSet(AggregateWorkingSet.java:262)
	at org.eclipse.ui.internal.AbstractWorkingSet.getElementsArray(AbstractWorkingSet.java:164)
	at org.eclipse.ui.internal.AbstractWorkingSet.isEmpty(AbstractWorkingSet.java:193)
	at org.eclipse.ui.internal.views.markers.MarkerFieldFilterGroup.getResourcesInWorkingSet(MarkerFieldFilterGroup.java:257)
	at org.eclipse.ui.internal.views.markers.MarkerFieldFilterGroup.computeWorkingSetResources(MarkerFieldFilterGroup.java:334)
	at org.eclipse.ui.internal.views.markers.MarkerFieldFilterGroup.refresh(MarkerFieldFilterGroup.java:701)
	at org.eclipse.ui.internal.views.markers.MarkerResourceUtil.getResourcesForFilter(MarkerResourceUtil.java:270)
	at org.eclipse.ui.internal.views.markers.MarkerResourceUtil.getResourcesFiltersOred(MarkerResourceUtil.java:136)
	at org.eclipse.ui.internal.views.markers.MarkerResourceUtil.computeResources(MarkerResourceUtil.java:66)
	at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.getResourcesForBuild(MarkerContentGenerator.java:975)
	at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.gatherMarkers(MarkerContentGenerator.java:1076)
	at org.eclipse.ui.internal.views.markers.MarkerContentGenerator.generateMarkerEntries(MarkerContentGenerator.java:1063)
	at org.eclipse.ui.internal.views.markers.MarkerUpdateJob.clean(MarkerUpdateJob.java:117)
	at org.eclipse.ui.internal.views.markers.MarkerUpdateJob.buildMarkers(MarkerUpdateJob.java:77)
	at org.eclipse.ui.internal.views.markers.MarkerUpdateJob.run(MarkerUpdateJob.java:57)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

[attachment=0]2013-11-27 08_35_47-Servoy_developer_removed_cyclic_dependency_error.png[/attachment]

What causes this error?

Sebastian,

It seems some working sets were using something from these plugins.
This is very much eclipse code: plugins and working sets.

You could try deleting and recreating working sets.

Rob

rgansevles:
It seems some working sets were using something from these plugins.
This is very much eclipse code: plugins and working sets.

Sorry, I was a little bit unclear. I mean the plugins from Servoy\application_server\plugins. Is your answer the same in this case?

Ok, then there must be something else because servoy plugins and eclipse plugins are completely unrelated.
Probably coincidence this happened after removing Servoy plugins.

Rob