Deletion of invalid (columnless) models causes NPE

I imported all of the SYS views of Oracle 11g which results in a number of tableless columns.
I have done something similar before and 'cleaned it up' by deleting them after the fact but given another bug of re-using models created in a prior release in a more current workspace/vdb I am re-importing/cleaning up.
The issue is now I get NPE when I select several of these tables and click delete.

org.eclipse.swt.SWTException: Failed to execute runnable (org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException))
at org.eclipse.swt.SWT.error(SWT.java:4397)
at org.eclipse.swt.SWT.error(SWT.java:4312)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:138)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4145)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3762)
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.explorer.ModelExplorerResourceNavigator.handleKeyPressed(ModelExplorerResourceNavigator.java:1738)
at org.eclipse.ui.views.navigator.ResourceNavigator$8.keyPressed(ResourceNavigator.java:507)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:167)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1057)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1081)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1108)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1104)
at org.eclipse.swt.widgets.Widget.wmKeyDown(Widget.java:1827)
at org.eclipse.swt.widgets.Control.WM_KEYDOWN(Control.java:4975)
at org.eclipse.swt.widgets.Tree.WM_KEYDOWN(Tree.java:6137)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4643)
at org.eclipse.swt.widgets.Tree.windowProc(Tree.java:6005)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4977)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2549)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3757)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:140)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:611)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
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:354)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
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:636)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
Caused by: org.eclipse.swt.SWTException: Failed to execute runnable (java.lang.NullPointerException)
at org.eclipse.swt.SWT.error(SWT.java:4397)
at org.eclipse.swt.SWT.error(SWT.java:4312)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:138)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4145)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3762)
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)
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)
... 45 more
Caused by: java.lang.NullPointerException
at org.teiid.designer.core.refactor.ObjectDeleteCommand.setObjectsToDelete(ObjectDeleteCommand.java:97)
at org.teiid.designer.ui.actions.workers.DeleteWorker.createObjectDeleteCommand(DeleteWorker.java:155)
at org.teiid.designer.ui.actions.DeleteEObjectAction.doRun(DeleteEObjectAction.java:83)
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)
... 56 more