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[protege-owl] 'IllegalArgumentException: null string' error message encountered when trying to run the 'infer' method on 'SWRLRuleEngineBridge'

Martin O'Connor martin.oconnor at stanford.edu
Wed Jan 28 11:39:08 PST 2009


What version of Protege-OWL are you using? Send me the offending ontology.

Martin

Vance Arocho wrote:

> For some reason, calling the 'infer' method on the 
> 'SWRLRuleEngineBridge' instance created within my code is throwing the 
> following exception, any ideas? It's not clear to me exactly what 
> value is a 'null string'.
>
>
> The following exception is: java.lang.IllegalArgumentException: null 
> string
> java.lang.IllegalArgumentException: null string
>         at 
> edu.stanford.smi.protege.model.framestore.ArgumentCheckingFrameStore.
> assertNotNull(Unknown Source)
>         at 
> edu.stanford.smi.protege.model.framestore.ArgumentCheckingFrameStore.
> checkString(Unknown Source)
>         at 
> edu.stanford.smi.protege.model.framestore.ArgumentCheckingFrameStore.
> getFrame(Unknown Source)
>         at 
> edu.stanford.smi.protege.model.framestore.ModificationFrameStore.getF
> rame(Unknown Source)
>         at 
> edu.stanford.smi.protege.model.framestore.FrameStoreAdapter.getFrame(
> Unknown Source)
>         at 
> edu.stanford.smi.protege.model.framestore.FrameStoreAdapter.getFrame(
> Unknown Source)
>         at 
> edu.stanford.smi.protege.model.framestore.FrameStoreAdapter.getFrame(
> Unknown Source)
>         at 
> edu.stanford.smi.protege.model.framestore.FrameStoreAdapter.getFrame(
> Unknown Source)
>         at 
> edu.stanford.smi.protege.model.framestore.FrameStoreAdapter.getFrame(
> Unknown Source)
>         at 
> edu.stanford.smi.protege.model.framestore.FrameStoreAdapter.getFrame(
> Unknown Source)
>         at 
> edu.stanford.smi.protege.model.framestore.FrameStoreAdapter.getFrame(
> Unknown Source)
>         at 
> edu.stanford.smi.protege.model.framestore.FrameStoreAdapter.getFrame(
> Unknown Source)
>         at 
> edu.stanford.smi.protege.model.framestore.FrameStoreAdapter.getFrame(
> Unknown Source)
>         at 
> edu.stanford.smi.protege.model.framestore.FrameStoreAdapter.getFrame(
> Unknown Source)
>         at 
> edu.stanford.smi.protege.model.DefaultKnowledgeBase.getFrame(Unknown
> Source)
>         at 
> edu.stanford.smi.protegex.owl.model.impl.AbstractOWLModel.getOWLIndiv
> idual(Unknown Source)
>         at 
> edu.stanford.smi.protegex.owl.swrl.bridge.impl.OWLIndividualImpl.<ini
> t>(Unknown Source)
>         at 
> edu.stanford.smi.protegex.owl.swrl.bridge.OWLFactory.createOWLIndivid
> ual(Unknown Source)
>         at 
> edu.stanford.smi.protegex.owl.swrl.bridge.impl.OWLPropertyImpl.buildO
> WLPropertyAssertionAxioms(Unknown Source)
>         at 
> edu.stanford.smi.protegex.owl.swrl.bridge.impl.AbstractSWRLRuleEngine
> Bridge.importOWLPropertyAssertionAxioms(Unknown Source)
>         at 
> edu.stanford.smi.protegex.owl.swrl.bridge.impl.AbstractSWRLRuleEngine
> Bridge.importOWLPropertyAssertionAxioms(Unknown Source)
>         at 
> edu.stanford.smi.protegex.owl.swrl.bridge.impl.AbstractSWRLRuleEngine
> Bridge.importSWRLRulesAndOWLKnowledge(Unknown Source)
>         at 
> edu.stanford.smi.protegex.owl.swrl.bridge.impl.AbstractSWRLRuleEngine
> Bridge.infer(Unknown Source)
>         at 
> edu.stanford.smi.protegex.owl.swrl.bridge.impl.AbstractSWRLRuleEngine
> Bridge.infer(Unknown Source)
>
>------------------------------------------------------------------------
>
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