[Pellet-users] null pointer exception in Individual.getRNeighborEdges(Individual.java: 690)

[Evren Sirin]

Usually this kind of exception is due to a URI that is not defined 
explicitly as a property but used in a restriction as a property. This 
is not allowed in OWL-DL and Pellet generally does a good job of 
catching and patching such untyped resources. But I'm guessing automatic 
patching failed in this case. Running the species validator would 
indicate which URI is the problem.

Or I'm completely wrong at my guess and something else is wrong :) 
Trying to extract a minimal ontology (or worst case the whole ontology 
itself) showing the problem would help us identify the problem.

Cheers,
Evren

On 3/13/08 6:46 AM, Henk-Jan Lebbink wrote:
> Dear List,
>
> I’m a dedicated Protégé and recently also a Pellet user. I and some
> colleagues use Pellet in combination with Protégé 3.4 to do consistency
> checks on our ontologies. However, we stumbled on a null pointer exception
> that, for the moment, we could not circumvent. The ontology is large, the
> expression was something with needles and haystacks - you get the point.
>
> Question: does someone know how to circumvent the exception (see below),
> or how can I submit some sort of bug report.
>
> With regards, and thanks in advance!
> Henk-Jan Lebbink.
>
> ---
> C:\Documents and Settings\Bo\Bureaublad\pellet 1.5.1 (8081)>rem  java -Xss4m
> -Xms30m -Xmx1600m -clas
> spath lib\pellet.jar org.mindswap.pellet.dig.PelletDIGServer
>
> C:\Documents and Settings\Bo\Bureaublad\pellet 1.5.1 (8081)>"C:\Program
> Files\Java\jre1.6.0_05\bin\j
> ava.exe" -Xss4m -Xms30m -Xmx2000000000 -classpath lib\pellet.jar -
> Dpellet.configuration=file:pellet.
> properties org.mindswap.pellet.dig.PelletDIGServer
>
> PelletDIGServer Version 1.5.1 (October 26 2007)
> Port: 8081
> java.lang.NullPointerException
>         at org.mindswap.pellet.Individual.getRNeighborEdges(Individual.java
> :690)
>         at org.mindswap.pellet.CompletionStrategy.applyAllValues(
> CompletionStrategy.java:920)
>         at org.mindswap.pellet.CompletionStrategy.addType(
> CompletionStrategy.java:273)
>         at org.mindswap.pellet.CompletionStrategy.applyUnfoldingRule(
> CompletionStrategy.java:643)
>         at org.mindswap.pellet.CompletionStrategy.applyUnfoldingRule(
> CompletionStrategy.java:614)
>         at org.mindswap.pellet.CompletionStrategy.initialize(
> CompletionStrategy.java:170)
>         at org.mindswap.pellet.SROIQStrategy.complete(SROIQStrategy.java
> :120)
>         at org.mindswap.pellet.ABox.isConsistent(ABox.java:1605)
>         at org.mindswap.pellet.ABox.isConsistent(ABox.java:1489)
>         at org.mindswap.pellet.KnowledgeBase.consistency(KnowledgeBase.java
> :1568)
>         at org.mindswap.pellet.KnowledgeBase.isConsistent(KnowledgeBase.java
> :1589)
>         at org.mindswap.pellet.dig.DIGAskHandler.asks(DIGAskHandler.java:54)
>         at org.mindswap.pellet.dig.PelletDIGReasoner.process(
> PelletDIGReasoner.java:160)
>         at org.mindswap.pellet.dig.PelletDIGReasoner.process(
> PelletDIGReasoner.java:112)
>         at org.mindswap.pellet.dig.PelletDIGReasoner.process(
> PelletDIGReasoner.java:102)
>         at org.mindswap.pellet.dig.PelletDIGServer.handle(
> PelletDIGServer.java:74)
>         at org.mortbay.http.HttpContext.handle(HttpContext.java:1565)
>         at org.mortbay.http.HttpContext.handle(HttpContext.java:1517)
>         at org.mortbay.http.HttpServer.service(HttpServer.java:954)
>         at org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
>         at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java
> :983)
>         at org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
>         at org.mortbay.http.SocketListener.handleConnection(
> SocketListener.java:244)
>         at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
>         at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
>
>
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