NPE Viewing Transformation

Viewing/Editing a transformation for a web service model generated from WSDL without automatically generating the XML Document model results in the following NPE:

java.lang.NullPointerException
at java.util.AbstractCollection.addAll(AbstractCollection.java:303)
at org.teiid.designer.query.sql.lang.util.CommandHelper.getProjectedSymbols(CommandHelper.java:33)
at org.teiid.designer.transformation.util.TransformationSqlHelper.getProjectedSymbolNames(TransformationSqlHelper.java:1253)
at org.teiid.designer.transformation.util.TransformationMappingHelper.compareQueryTargetAndSQLOutput(TransformationMappingHelper.java:201)
at org.teiid.designer.transformation.ui.editors.TransformationObjectEditorPage.setMessageDisplayForValidSQL(TransformationObjectEditorPage.java:2956)
at org.teiid.designer.transformation.ui.editors.TransformationObjectEditorPage.setEditorMessage(TransformationObjectEditorPage.java:1436)
at org.teiid.designer.transformation.ui.editors.TransformationObjectEditorPage.setEditorContent(TransformationObjectEditorPage.java:1022)
at org.teiid.designer.transformation.ui.editors.TransformationObjectEditorPage.edit(TransformationObjectEditorPage.java:839)
at org.teiid.designer.webservice.ui.editor.OperationObjectEditorPage.edit(OperationObjectEditorPage.java:410)
at org.teiid.designer.ui.editors.ModelObjectEditorPanel.activateModelObjectEditor(ModelObjectEditorPanel.java:152)
at org.teiid.designer.ui.editors.MultiPageModelEditor.editModelObject(MultiPageModelEditor.java:391)
at org.teiid.designer.webservice.ui.editor.OperationEditorPage.openObjectEditor(OperationEditorPage.java:360)
at org.teiid.designer.webservice.ui.editor.OperationEditorPage.updateUi(OperationEditorPage.java:465)
at org.teiid.designer.webservice.ui.editor.OperationEditorPage$1.widgetSelected(OperationEditorPage.java:137)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4136)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1458)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1481)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1466)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1271)
at org.teiid.designer.ui.editors.MultiPageModelEditor.selectPage(MultiPageModelEditor.java:876)
at org.teiid.designer.ui.editors.ModelEditorManager$3.run(ModelEditorManager.java:181)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
... 23 more