[Pellet-users] Null Pointer Exception

[James A Miller]

I am receiving the following NullPointerException from Pellet 1.5.2.  I 
don't know if I can easily send the example code; if necessary, I can look 
into that. 

Any help or suggestions would be appreciated.


java.lang.NullPointerException
        at org.mindswap.pellet.Node.updateNodeReferences(Node.java:196)
        at org.mindswap.pellet.Individual.updateNodeReferences(
Individual.java:1112)
        at org.mindswap.pellet.ABox.<init>(ABox.java:294)
        at org.mindswap.pellet.ABox.<init>(ABox.java:220)
        at org.mindswap.pellet.ABox.copy(ABox.java:362)
        at org.mindswap.pellet.ABox.isConsistent(ABox.java:1578)
        at org.mindswap.pellet.ABox.isConsistent(ABox.java:1499)
        at org.mindswap.pellet.KnowledgeBase.consistency(
KnowledgeBase.java:1568)
        at org.mindswap.pellet.KnowledgeBase.isConsistent(
KnowledgeBase.java:1589)
        at org.mindswap.pellet.jena.PelletInfGraph.prepare(
PelletInfGraph.java:267)
        at org.mindswap.pellet.jena.PelletInfGraph.findWithContinuation(
PelletInfGraph.java:203)
        at com.hp.hpl.jena.reasoner.BaseInfGraph.graphBaseFind(
BaseInfGraph.java:345)
        at com.hp.hpl.jena.graph.impl.GraphBase.find(GraphBase.java:257)
        at com.hp.hpl.jena.rdf.model.impl.ModelCom.listStatements(
ModelCom.java:385)
        at com.hp.hpl.jena.rdf.model.impl.ModelCom.listStatements(
ModelCom.java:390)
        at com.rtn.km.dks.ks.jena.JenaKnowledgeProvider.match(
JenaKnowledgeProvider.java:132)
        at 
com.rtn.km.dks.ks.impl.SparqlRdfDatasetKsImpl2$MyRdfTripleIterable.iterator(
SparqlRdfDatasetKsImpl2.java:186)
        at 
com.rtn.km.dks.rdf.impl.ConcurrentBufferedRdfTripleIterator$IteratorRunnable.run(
ConcurrentBufferedRdfTripleIterator.java:190)
        at java.lang.Thread.run(Thread.java:619)

Thanks,
Jim
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