java.lang.IllegalArgumentException (modelResource == NULL) importing PartsSupplier from DB2

java.lang.IllegalArgumentException: modelResource is null
at com.metamatrix.core.util.CoreArgCheck.isNotNull(CoreArgCheck.java:139)
at org.teiid.designer.core.extension.ModelObjectExtensionAssistant.getModelResource(ModelObjectExtensionAssistant.java:69)
at org.teiid.designer.core.extension.ModelObjectExtensionAssistant.hasExtensionProperties(ModelObjectExtensionAssistant.java:253)
at com.metamatrix.modeler.internal.ui.explorer.ModelExplorerLabelProvider.decorate(ModelExplorerLabelProvider.java:354)
at org.eclipse.ui.internal.decorators.LightweightDecoratorDefinition.decorate(LightweightDecoratorDefinition.java:263)
at org.eclipse.ui.internal.decorators.LightweightDecoratorManager$LightweightRunnable.run(LightweightDecoratorManager.java:81)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.decorators.LightweightDecoratorManager.decorate(LightweightDecoratorManager.java:365)
at org.eclipse.ui.internal.decorators.LightweightDecoratorManager.getDecorations(LightweightDecoratorManager.java:347)
at org.eclipse.ui.internal.decorators.DecorationScheduler$1.ensureResultCached(DecorationScheduler.java:370)
at org.eclipse.ui.internal.decorators.DecorationScheduler$1.run(DecorationScheduler.java:330)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)