Exception in Visual Application Diagram

I don't normally use VAD...foudn it less than useful in the past.

But I thought I'd give it another shot, I get an exception:

!ENTRY org.eclipse.rse.ui 4 0 2017-08-04 09:12:11.211
!MESSAGE RSEG1003U: SUB#0:java.lang.NullPointerException
java.lang.NullPointerException
at
com.ibm.etools.iseries.application.collector.rpgle.RPGLECollector.populateCallableBocks(Unknown
Source)
at
com.ibm.etools.iseries.application.collector.rpgle.RPGLECollector.populate(Unknown
Source)
at
com.ibm.etools.systems.application.collector.CollectorManager.buildModel(Unknown
Source)
at
com.ibm.etools.iseries.application.controller.actions.internal.ApplicationModelBuildJob.run(Unknown
Source)
at org.eclipse.core.internal.jobs.Worker.run(Unknown Source)

!STACK 0
java.lang.Exception
at org.eclipse.rse.ui.messages.SystemMessageDialog.logMessage(Unknown
Source)
at org.eclipse.rse.ui.messages.SystemMessageDialog.open(Unknown Source)
at
com.ibm.etools.iseries.application.controller.actions.internal.BuildNavigatorActionHelper.buildandOpenNavigator(Unknown
Source)
at
com.ibm.etools.iseries.application.controller.actions.internal.BuildNavigatorActionHelper.buildAndOpenNavigatorForLPEX(Unknown
Source)
at
com.ibm.etools.iseries.application.controller.actions.internal.BuildNavigatorFromEditorAction.run(Unknown
Source)
at
com.ibm.etools.systems.editor.internal.SystemEditorPluginAction.runWithEvent(Unknown
Source)
at
org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(Unknown
Source)
at org.eclipse.jface.action.ActionContributionItem.access$2(Unknown Source)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(Unknown
Source)
at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Display.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
at
org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(Unknown
Source)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Unknown
Source)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(Unknown
Source)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(Unknown
Source)
at org.eclipse.ui.internal.Workbench$5.run(Unknown Source)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Unknown
Source)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Unknown Source)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(Unknown Source)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(Unknown
Source)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(Unknown Source)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(Unknown
Source)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(Unknown
Source)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(Unknown Source)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(Unknown Source)
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(Unknown Source)
at org.eclipse.equinox.launcher.Main.basicRun(Unknown Source)
at org.eclipse.equinox.launcher.Main.run(Unknown Source)
at org.eclipse.equinox.launcher.Main.main(Unknown Source)

The diagram gets build and displayed, but the diagram has the Program node,
with 26 internal sub procedures shown...but no links between them.

The only links are to 3 external procedures.

Running Version: 9.5.1.2

Thoughts?
Charles