when i commited my project, i got an exception. for the project, i also then got exceptions when trying to update or to revert. restarting eclipse did not help.
deleting the local copy and rechecking out the project did help, the error was gone.
the malfunctioning project is attached.
here is the stack trace:
java.lang.nullpointerexception
	at org.unicase.emfstore.esmodel.versioning.operations.util.operationscanonizer.foldattributes(operationscanonizer.java:266)
	at org.unicase.emfstore.esmodel.versioning.operations.util.operationscanonizer.canonize(operationscanonizer.java:45)
	at org.unicase.emfstore.esmodel.versioning.impl.changepackageimpl.cannonize(changepackageimpl.java:301)
	at org.unicase.workspace.impl.projectspaceimpl.getlocalchangepackage(projectspaceimpl.java:1221)
	at org.unicase.workspace.impl.projectspaceimpl.commit(projectspaceimpl.java:1165)
	at org.unicase.workspace.ui.commands.commitprojecthandler.commit(commitprojecthandler.java:104)
	at org.unicase.workspace.ui.commands.commitprojecthandler.run(commitprojecthandler.java:75)
	at org.unicase.workspace.ui.commands.serverrequesthandler.handlerun(serverrequesthandler.java:121)
	at org.unicase.workspace.ui.commands.serverrequesthandler.handleexceptionandretry(serverrequesthandler.java:164)
	at org.unicase.workspace.ui.commands.serverrequesthandler.handlerun(serverrequesthandler.java:135)
	at org.unicase.workspace.ui.commands.serverrequestcommandhandler$1.dorun(serverrequestcommandhandler.java:44)
	at org.unicase.workspace.util.unicasecommandwithresult.doexecute(unicasecommandwithresult.java:35)
	at org.eclipse.emf.transaction.recordingcommand.execute(recordingcommand.java:133)
	at org.eclipse.emf.common.command.basiccommandstack.execute(basiccommandstack.java:84)
	at org.eclipse.emf.transaction.impl.abstracttransactionalcommandstack.basicexecute(abstracttransactionalcommandstack.java:241)
	at org.eclipse.emf.transaction.impl.transactionalcommandstackimpl.doexecute(transactionalcommandstackimpl.java:63)
	at org.eclipse.emf.transaction.impl.abstracttransactionalcommandstack.execute(abstracttransactionalcommandstack.java:165)
	at org.eclipse.emf.transaction.impl.abstracttransactionalcommandstack.execute(abstracttransactionalcommandstack.java:219)
	at org.unicase.workspace.util.unicasecommandwithresult.run(unicasecommandwithresult.java:52)
	at org.unicase.workspace.ui.commands.serverrequestcommandhandler.execute(serverrequestcommandhandler.java:52)
	at org.eclipse.ui.internal.handlers.handlerproxy.execute(handlerproxy.java:294)
	at org.eclipse.core.commands.command.executewithchecks(command.java:476)
	at org.eclipse.core.commands.parameterizedcommand.executewithchecks(parameterizedcommand.java:508)
	at org.eclipse.ui.internal.handlers.handlerservice.executecommand(handlerservice.java:169)
	at org.eclipse.ui.internal.handlers.slavehandlerservice.executecommand(slavehandlerservice.java:241)
	at org.eclipse.ui.internal.handlers.slavehandlerservice.executecommand(slavehandlerservice.java:241)
	at org.eclipse.ui.menus.commandcontributionitem.handlewidgetselection(commandcontributionitem.java:770)
	at org.eclipse.ui.menus.commandcontributionitem.access$10(commandcontributionitem.java:756)
	at org.eclipse.ui.menus.commandcontributionitem$5.handleevent(commandcontributionitem.java:746)
	at org.eclipse.swt.widgets.eventtable.sendevent(eventtable.java:84)
	at org.eclipse.swt.widgets.widget.sendevent(widget.java:1003)
	at org.eclipse.swt.widgets.display.rundeferredevents(display.java:3880)
	at org.eclipse.swt.widgets.display.readanddispatch(display.java:3473)
	at org.eclipse.ui.internal.workbench.runeventloop(workbench.java:2405)
	at org.eclipse.ui.internal.workbench.runui(workbench.java:2369)
	at org.eclipse.ui.internal.workbench.access$4(workbench.java:2221)
	at org.eclipse.ui.internal.workbench$5.run(workbench.java:500)
	at org.eclipse.core.databinding.observable.realm.runwithdefault(realm.java:332)
	at org.eclipse.ui.internal.workbench.createandrunworkbench(workbench.java:493)
	at org.eclipse.ui.platformui.createandrunworkbench(platformui.java:149)
	at org.eclipse.ui.internal.ide.application.ideapplication.start(ideapplication.java:113)
	at org.eclipse.equinox.internal.app.eclipseapphandle.run(eclipseapphandle.java:194)
	at org.eclipse.core.runtime.internal.adaptor.eclipseapplauncher.runapplication(eclipseapplauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.eclipseapplauncher.start(eclipseapplauncher.java:79)
	at org.eclipse.core.runtime.adaptor.eclipsestarter.run(eclipsestarter.java:368)
	at org.eclipse.core.runtime.adaptor.eclipsestarter.run(eclipsestarter.java:179)
	at sun.reflect.nativemethodaccessorimpl.invoke0(native method)
	at sun.reflect.nativemethodaccessorimpl.invoke(unknown source)
	at sun.reflect.delegatingmethodaccessorimpl.invoke(unknown source)
	at java.lang.reflect.method.invoke(unknown source)
	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)


