[kepler-dev] Getting exception when using PNDirector

[Christopher Brooks]

Hi Ravi,
You need to call _top.preinitialize() and _top.initialize() first.
I modified CompositeProcessDirector so that if _inputBranchController is 
null, then an InternalErrorException is thrown:

Exception in thread "main" ptolemy.kernel.util.InternalErrorException: 
_inputBranchController was null\
?  Perhaps initialize() was not called?
   in .top.<Unnamed Object>
         at 
ptolemy.actor.process.CompositeProcessDirector._resolveDeadlock(CompositeProcessDirector.ja\
va:701)
         at 
ptolemy.actor.process.ProcessDirector.fire(ProcessDirector.java:259)
         at ptolemy.actor.CompositeActor.fire(CompositeActor.java:458)
         at test.BowtieTest.init(BowtieTest.java:65)
         at test.BowtieTest.main(BowtieTest.java:18)


See ptolemy/moml/MoMLSimpleApplication.java for how to use 
ptolemy/actor/Manager.java to run your model:

         _manager = new Manager(_toplevel.workspace(), 
"MoMLSimpleApplication");
         _toplevel.setManager(_manager);
         _toplevel.addChangeListener(this);

         _manager.addExecutionListener(this);
         _activeCount++;

         _manager.startRun();

         Thread waitThread = new UnloadThread();

         // Note that we start the thread here, which could
         // be risky when we subclass, since the thread will be
         // started before the subclass constructor finishes (FindBugs)
         waitThread.start();
         waitThread.join();
         if (_sawThrowable != null) {
               throw _sawThrowable;
         }

For information about initialize(), see Chapter 5, Designing Actors, 
page 178 of Volume 1 of the Ptolemy Design Docs at 
http://ptolemy.eecs.berkeley.edu/ptolemyII/designdoc.htm

_Christopher



On 1/9/12 5:17 AM, Ravi Kumar wrote:
>
> Hi All,
>
> I am trying to create and run a workflow programmatically. I have 
> created one and able to run if I use SDF director. But not able to run 
> this using PNDirector. When I export the workflow in xml using 
> *exportMoML()* method and open the xml file in kepler, it runs properly.
>
> Following error I am getting when trying to execute workflow 
> programmatically  using PNDirector.
>
> **
>
> Exception in thread "main" _java.lang.NullPointerException_
>
>       at 
> ptolemy.actor.process.CompositeProcessDirector._resolveDeadlock(_CompositeProcessDirector.java:699_)
>
>       at 
> ptolemy.actor.process.ProcessDirector.fire(_ProcessDirector.java:259_)
>
>       at ptolemy.actor.CompositeActor.fire(_CompositeActor.java:459_)
>
>       at test.BowtieTest.init(_BowtieTest.java:64_)
>
>       at test.BowtieTest.main(_BowtieTest.java:18_)**
>
> I am not able to find out root cause for this. Any help on this would 
> be really helpful.
>
> Regards,
>
> Ravi
>
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-- 
Christopher Brooks, PMP                       University of California
CHESS Executive Director                      US Mail: 337 Cory Hall
Programmer/Analyst CHESS/Ptolemy/Trust        Berkeley, CA 94720-1774
ph: 510.643.9841                                (Office: 545Q Cory)
home: (F-Tu) 707.665.0131 cell: 707.332.0670

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