can you please retest first.

at org.eclipse.core.runtime.adaptor.eclipsestarter.run(eclipsestarter.java:179)
at sun.reflect.nativemethodaccessorimpl.invoke0(native method)
at sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:39)
at sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:25)
at java.lang.reflect.method.invoke(method.java:597)
at org.eclipse.equinox.launcher.main.invokeframework(main.java:559)
at org.eclipse.equinox.launcher.main.basicrun(main.java:514)
at org.eclipse.equinox.launcher.main.run(main.java:1311)
at org.eclipse.equinox.launcher.main.main(main.java:1287)
caused by: java.lang.illegalargumentexception: cannot delete a model element that is not contained in this project.
at org.unicase.metamodel.impl.projectimpl.deletemodelelement(projectimpl.java:481)
at org.unicase.metamodel.impl.modelelementimpl.delete(modelelementimpl.java:117)
at org.unicase.ui.meeditor.commands.deletemodelelementcommand.dorun(deletemodelelementcommand.java:63)
at org.unicase.workspace.util.unicasecommand.doexecute(unicasecommand.java:32)
at org.eclipse.emf.transaction.recordingcommand.execute(recordingcommand.java:133)
at org.eclipse.emf.common.command.basiccommandstack.execute(basiccommandstack.java:84)
... 32 more
