[Pellet-users] need help in the exception ->NoClassDefFoundError:org.relaxng.datatype.DatatypeException

[Eman Hossny]

Hello,
i have an ontology file & i need to read this ontology into OntoModel, but
when i write the line
OntModel ontModel = ModelFactory.createOntologyModel(
PelletReasonerFactory.THE_SPEC );
the following exception appear, can anyone help be in this exception:
java.lang.NoClassDefFoundError: org/relaxng/datatype/DatatypeException

-- 
Eman Hossny,
Teacher Assistant,
Computer Science Department,
Faculty of Computers and Information
Cairo University, Egypt

يارب العتق من النار لى ولوالديا
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