Deleted objects with a model editor open and got following:
java.lang.NullPointerException at org.teiid.designer.ui.viewsupport.ModelUtilities.getModelName(ModelUtilities.java:497) at org.teiid.designer.ui.table.ModelRowElement.getValue(ModelRowElement.java:335) at org.teiid.designer.ui.table.ModelTableLabelProvider.getColumnText(ModelTableLabelProvider.java:40) 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:400) 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:278) at org.eclipse.jface.viewers.AbstractTableViewer.internalRefreshAll(AbstractTableViewer.java:758) at org.eclipse.jface.viewers.AbstractTableViewer.internalRefresh(AbstractTableViewer.java:650) at org.eclipse.jface.viewers.AbstractTableViewer.internalRefresh(AbstractTableViewer.java:637) at org.eclipse.jface.viewers.AbstractTableViewer$2.run(AbstractTableViewer.java:593) 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.AbstractTableViewer.inputChanged(AbstractTableViewer.java:591) at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:280) at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1690) at org.teiid.designer.ui.table.ModelObjectTableModel.buildColumns(ModelObjectTableModel.java:273) at org.teiid.designer.ui.table.ModelObjectTableModel.buildColumns(ModelObjectTableModel.java:214) at org.teiid.designer.ui.table.ModelObjectTableModel.removeRows(ModelObjectTableModel.java:326) at org.teiid.designer.ui.table.TableNotificationHandler.handleSingleEObjectNotification(TableNotificationHandler.java:264) at org.teiid.designer.ui.table.TableNotificationHandler.handleSingleNotification(TableNotificationHandler.java:202) at org.teiid.designer.ui.table.TableNotificationHandler.handleNotification(TableNotificationHandler.java:175) at org.teiid.designer.ui.table.TableNotificationHandler.notifyChanged(TableNotificationHandler.java:82) at org.teiid.designer.ui.editors.ModelEditor$5.run(ModelEditor.java:1157) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3717) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3366) at org.eclipse.jface.operation.ModalContext$ModalContextThread.block(ModalContext.java:173) at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:388) at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507) at org.teiid.designer.ui.actions.workers.DeleteWorker.executeCommand(DeleteWorker.java:211) at org.teiid.designer.ui.actions.workers.DeleteWorker.execute(DeleteWorker.java:131) at org.teiid.designer.ui.actions.ModelObjectAction.doRun(ModelObjectAction.java:62) at org.teiid.designer.ui.actions.DeleteEObjectAction.doRun(DeleteEObjectAction.java:88) at org.teiid.designer.ui.common.actions.AbstractAction$1.run(AbstractAction.java:544) at org.teiid.designer.ui.common.viewsupport.UiBusyIndicator$2$1.run(UiBusyIndicator.java:206) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3717) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3366) at org.teiid.designer.ui.common.viewsupport.UiBusyIndicator.executeRunnable(UiBusyIndicator.java:227) at org.teiid.designer.ui.common.viewsupport.UiBusyIndicator.showWhileInternal(UiBusyIndicator.java:159) at org.teiid.designer.ui.common.viewsupport.UiBusyIndicator.showWhile(UiBusyIndicator.java:116) at org.teiid.designer.ui.common.actions.AbstractAction.run(AbstractAction.java:547) at org.teiid.designer.ui.actions.DeleteAction.doRun(DeleteAction.java:335)