Exception on Ontocat `index creation :

• Exception in thread "main" java.lang.NoClassDefFoundError: org/semanticweb/owl/model/OWLOntologyCreationException
  • uses the OWL API for reading ontologies. This error suggests that lib/pellet/owlapi/owlapi-api.jar is not on your classpath.
  •  http://protege-ontology-editor-knowledge-acquisition-system.136.n4.nabble.com/Setting-up-OWL-API-protege-4-1-for-eclipse-td2017995.html *