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What steps will reproduce the problem? 1. Create a ecore model and AIRD file 2. Close eclipse or project 3. Reopen project / eclipse: renders the error. Ecore model is ok -- Error Details -- Date: Thu Oct 26 16:00:45 CEST 2017 Message: An internal error occurred during: "Loading models". Severity: Error Product: Eclipse 4.7.1.20171005-1200 (org.eclipse.epp.package.modeling.product) Plugin: org.eclipse.core.jobs Session Data: eclipse.buildId=4.7.1.M20171009-0410 java.version=1.8.0_152 java.vendor=Oracle Corporation BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US Framework arguments: -product org.eclipse.epp.package.modeling.product Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.modeling.product Exception Stack Trace: java.lang.RuntimeException: The modeling project "ESDL" is invalid: Problem during loading models: Cannot modify resource set without a write transaction at org.eclipse.sirius.ui.tools.internal.views.common.modelingproject.OpenRepresentationsFileJob.runInWorkspace(OpenRepresentationsFileJob.java:136) at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:39) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56) Caused by: java.lang.IllegalStateException: Cannot modify resource set without a write transaction at org.eclipse.emf.transaction.impl.TransactionChangeRecorder.assertWriting(TransactionChangeRecorder.java:349) at org.eclipse.emf.transaction.impl.TransactionChangeRecorder.appendNotification(TransactionChangeRecorder.java:303) at org.eclipse.emf.transaction.impl.TransactionChangeRecorder.processObjectNotification(TransactionChangeRecorder.java:285) at org.eclipse.emf.transaction.impl.TransactionChangeRecorder.notifyChanged(TransactionChangeRecorder.java:241) at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:374) at org.eclipse.xsd.impl.XSDConcreteComponentImpl.eNotify(XSDConcreteComponentImpl.java:1153) at org.eclipse.emf.ecore.util.EcoreEList.dispatchNotification(EcoreEList.java:249) at org.eclipse.emf.common.notify.impl.NotifyingListImpl.addAllUnique(NotifyingListImpl.java:457) at org.eclipse.emf.common.notify.impl.NotifyingListImpl.addAllUnique(NotifyingListImpl.java:400) at org.eclipse.emf.common.util.AbstractEList.addAll(AbstractEList.java:372) at org.eclipse.xsd.impl.XSDSimpleTypeDefinitionImpl.createFundamentalFacets(XSDSimpleTypeDefinitionImpl.java:3037) at org.eclipse.xsd.impl.XSDSimpleTypeDefinitionImpl.getCardinalityFacet(XSDSimpleTypeDefinitionImpl.java:3000) at org.eclipse.xsd.impl.XSDSimpleTypeDefinitionImpl.eGet(XSDSimpleTypeDefinitionImpl.java:2599) at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1011) at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1003) at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:998) at org.eclipse.sirius.ecore.extender.tool.internal.ReferencesResolver.resolveCrossReferences(ReferencesResolver.java:100) at org.eclipse.sirius.ecore.extender.tool.internal.ReferencesResolver.doResolveAll(ReferencesResolver.java:93) at org.eclipse.sirius.ecore.extender.tool.internal.ReferencesResolver.resolve(ReferencesResolver.java:74) at org.eclipse.sirius.ecore.extender.tool.api.ModelUtils.resolveAll(ModelUtils.java:452) at org.eclipse.sirius.business.internal.session.danalysis.SessionResourcesTracker.forceLoadingOfEveryLinkedResource(SessionResourcesTracker.java:180) at org.eclipse.sirius.business.internal.session.danalysis.SessionResourcesTracker.initialize(SessionResourcesTracker.java:97) at org.eclipse.sirius.business.internal.session.danalysis.DAnalysisSessionImpl.open(DAnalysisSessionImpl.java:1149) at org.eclipse.sirius.business.internal.session.SessionManagerImpl.openSession(SessionManagerImpl.java:382) at org.eclipse.sirius.ui.tools.internal.views.common.modelingproject.OpenRepresentationsFileJob.performOpenSession(OpenRepresentationsFileJob.java:157) at org.eclipse.sirius.ui.tools.internal.views.common.modelingproject.OpenRepresentationsFileJob.runInWorkspace(OpenRepresentationsFileJob.java:126) ... 2 more
Moving to Sirius. Can you attach the offending Ecore (maybe simplified/obfuscated if needed)? The certainly does not happen with most Ecore files. From the stack I assume you created your Ecore from an existing XSD?
I can't reproduce even using and XSD-based ecore (using the library.xsd example from the EMF documentation). Once I got the ecore, I created a Sirius session, enabled the "Design" viewpoint from Ecore Tools and created a class diagram. Closing/reopening the diagram, or the session, or the whole Eclipse works without any issue (and nothing in the error log). Whatever the bug is, it seems dependant on specific conditions.
Given the stack, it looks like a duplicate of bug #513407. *** This bug has been marked as a duplicate of bug 513407 ***
