Received IllegalArgumentException while re-importing JDBC Source tables.

The Compare part of the importer relies on both the existing Model and the Temporary model which is NOT in the basic workspace model container, so in this case the EmfModelObjectExtensionAssistant needs to be aware that ModelResource may be NULL at this point and is OK?

java.lang.IllegalArgumentException: modelResource is null
at com.metamatrix.core.util.CoreArgCheck.isNotNull(CoreArgCheck.java:139)
at org.teiid.designer.core.extension.EmfModelObjectExtensionAssistant.getModelResource(EmfModelObjectExtensionAssistant.java:62)
at org.teiid.designer.core.extension.EmfModelObjectExtensionAssistant.getSupportedNamespaces(EmfModelObjectExtensionAssistant.java:233)
at org.teiid.designer.extension.ModelExtensionAssistantAggregator.getSupportedNamespacePrefixes(ModelExtensionAssistantAggregator.java:102)
at org.teiid.designer.extension.ModelExtensionAssistantAggregator.getPropertyDefinitions(ModelExtensionAssistantAggregator.java:60)
at org.teiid.designer.ui.properties.extension.ModelExtensionPropertySource.getPropertyDescriptors(ModelExtensionPropertySource.java:65)
at com.metamatrix.modeler.internal.ui.properties.ModelObjectPropertySource.getAllDescriptors(ModelObjectPropertySource.java:211)
at com.metamatrix.modeler.internal.ui.properties.ModelObjectPropertySource.getPropertyDescriptors(ModelObjectPropertySource.java:309)
at com.metamatrix.modeler.compare.ui.tree.DifferenceDescriptorPanel$TableViewerLabelProvider.getColumnText(DifferenceDescriptorPanel.java:348)
at org.eclipse.jface.viewers.TableColumnViewerLabelProvider.update(TableColumnViewerLabelProvider.java:70)
at org.eclipse.jface.viewers.ViewerColumn.refresh(ViewerColumn.java:152)
at org.eclipse.jface.viewers.AbstractTableViewer.doUpdateItem(AbstractTableViewer.java:399)
at org.eclipse.jface.viewers.CheckboxTableViewer.doUpdateItem(CheckboxTableViewer.java:168)
at org.eclipse.jface.viewers.StructuredViewer$UpdateItemSafeRunnable.run(StructuredViewer.java:485)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
at org.eclipse.jface.viewers.StructuredViewer.updateItem(StructuredViewer.java:2167)
at org.eclipse.jface.viewers.AbstractTableViewer.createItem(AbstractTableViewer.java:277)
at org.eclipse.jface.viewers.AbstractTableViewer.internalRefreshAll(AbstractTableViewer.java:757)
at org.eclipse.jface.viewers.AbstractTableViewer.internalRefresh(AbstractTableViewer.java:649)
at org.eclipse.jface.viewers.AbstractTableViewer.internalRefresh(AbstractTableViewer.java:636)
at org.eclipse.jface.viewers.StructuredViewer$7.run(StructuredViewer.java:1508)
at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1443)
at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1404)
at org.eclipse.jface.viewers.CheckboxTableViewer.preservingSelection(CheckboxTableViewer.java:348)
at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1506)
at org.eclipse.jface.viewers.ColumnViewer.refresh(ColumnViewer.java:537)
at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1465)
at com.metamatrix.modeler.compare.ui.tree.DifferenceDescriptorPanel.updateTableRows(DifferenceDescriptorPanel.java:261)
at com.metamatrix.modeler.compare.ui.tree.DifferenceDescriptorPanel.setDescriptor(DifferenceDescriptorPanel.java:238)
at com.metamatrix.modeler.compare.ui.tree.DifferenceReportsPanel.updateDescriptorPanel(DifferenceReportsPanel.java:683)
at com.metamatrix.modeler.compare.ui.tree.DifferenceReportsPanel$1.selectionChanged(DifferenceReportsPanel.java:406)
at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:164)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:162)
at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:2188)
at org.eclipse.jface.viewers.StructuredViewer.setSelection(StructuredViewer.java:1725)
at org.eclipse.jface.viewers.TreeViewer.setSelection(TreeViewer.java:1139)
at com.metamatrix.modeler.compare.ui.tree.CompareTreePanel.doTreeSelection(CompareTreePanel.java:678)
at com.metamatrix.modeler.compare.ui.tree.CompareTreePanel$6.run(CompareTreePanel.java:650)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)