Teiid Designer unable to modify or save VDB when UNC path is used for workspace

"Unhandled event loop exception" when trying to re-add model to VDB

java.lang.ArrayIndexOutOfBoundsException: 0
     at org.teiid.designer.vdb.VdbModelEntry.synchronizeModelEntry(VdbModelEntry.java:435)
     at org.teiid.designer.vdb.Vdb.addModelEntry(Vdb.java:244)
     at com.metamatrix.modeler.internal.vdb.ui.editor.VdbEditor$25.selected(VdbEditor.java:1709)
     at com.metamatrix.ui.table.TableAndToolBar$2.run(TableAndToolBar.java:79)
     at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
     at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
     at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
     at org.eclipse.jface.action.ActionContributionItem$6.handleEvent(ActionContributionItem.java:452)
     at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
     at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
     at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)
     at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
     at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
     at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
     at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
     at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
     at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
     at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
     at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
     at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
     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:369)
     at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620)
     at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)
     at org.eclipse.equinox.launcher.Main.run(Main.java:1408)