As Dave already pointed out your stack trace is not Jena code so we can't help you with that.
As he also pointed out you are getting a NullPointerException which means the variable ontModel likely is never instantiated. Like any object oriented code things are not instantiated by magic, just because that class comes from Jena doesn't mean it's Jena's fault if you or the code you are using fail to instantiate it. Do you even try and instantiate your OntModel? ontModel = ModelFactory.createOntologyModel(); Rob On 6/16/12 12:51 PM, "Fairouz FakhFakh" <[email protected]> wrote: > >Thank you for your fast reply.But, in my code, I have: >import com.hp.hpl.jena.ontology.OntModel; > >public class OWLSProfileParser { >private OntModel ontModel; > > >......String URI= >"http://www.daml.org/services/owl-s/1.0/BravoAirProfile.owl";ontModel.addL >oadedImport(URI); >....} >So, I think that the problem in "jena.jar". ("OntModel" comes from >jena).I use jena-2.4.jar . I put this file in the lib of my project and >in the jre.So, please, can you help me?Thank you in advance. > >-- > >Fairouz FAKHFAKH > >Ingénieur informatique > >Ecole Nationale d'Ingénieurs de Sfax > >> Date: Sat, 16 Jun 2012 15:21:57 +0100 >> From: [email protected] >> To: [email protected] >> Subject: Re: Problem jena >> >> On 16/06/12 14:32, Fairouz FakhFakh wrote: >> > >> > Hello,I use: matchmaker-client >> > In the class OWLSProfileParser, I have a problem in this >>line:ontModel.addLoadedImport(URI);I have the following error:Exception >>in thread "main" java.lang.NullPointerException at >>EDU.cmu.Atlas.owls1_1.parser.OWLSProfileParser.read(OWLSProfileParser.jav >>a:118) at >>EDU.cmu.Atlas.owls1_1.parser.OWLSProfileParser.read(OWLSProfileParser.jav >>a:97) at >>EDU.cmu.Atlas.matchmaker.client.OWLSMatchmakerClient.parseOWLSProfile(OWL >>SMatchmakerClient.java:226) at >>EDU.cmu.Atlas.matchmaker.client.OWLSMatchmakerClient.register(OWLSMatchma >>kerClient.java:99) at >>EDU.cmu.Atlas.matchmaker.client.OWLSMatchmakerClient.main(OWLSMatchmakerC >>lient.java:247) >> > I found the method "addLoadedImport" in the class "ontModel.class" of >>the jar jena. >> > Can someone help me, please?Thank you in advance. >> > >> >> Your exception trace does not show any use of Jena code, you need to >>ask >> the people who wrote OWLSProfileParse. >> >> If you are getting NPE at the line >> >> ontModel.addLoadedImport(URI); >> >> then that means ontModel is null. Jena is not getting called. >> >> Dave >> >> >> >
