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[protege-owl] Running JessTab in Protegé 3.2

Samson Tu swt at
Fri Sep 1 09:30:08 PDT 2006

To use JessTab, put jesstab.jar and jess.jar in the same directory under 

To use Jess with SWRL, you have to put jess.jar in the 
edu.stanford.smi.protegex.owl subdirectory of plugins. See


Steven Wartik wrote:
> Teresa,
> I seem to recall that JessTab requires version 7 of Jess.
> Steve Wartik
> Teresa Carcelén Fernández wrote:
>> Hi all,
>> I´m new with protegé 3.2. I´m trying to use the Jess Tab. I´ve 
>> downloaded and I´ve pasted "jess.jar" in the folder 
>> Plugins of Protegé
>> I get: Error loading Jess. Is the Jess JAR in the Protege-OWL plugin 
>> directory? I´ve added the path in the CLASSPATH
>> When I try to I enable SWRL and activate Jess, I get :"Unable to 
>> activate the Jess rule engine"
>> Can anyone help me?
>> Best regards
>> Teresa
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>> protege-owl at
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Samson Tu                    email: swt at
Senior Research Scientist    web:
Stanford Medical Informatics phone: 1-650-725-3391
Stanford University          fax: 1-650-725-7944

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