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[protege-owl] SWRLTab problems when running protege-owl in eclipse

Martin O'Connor martin.oconnor at
Thu Apr 1 17:31:31 PDT 2010

This sounds like an Eclipse project configuration problem. Have you 
added jess.jar to your execution path for your run configurations? It 
may be different from your built path.


William Fitzgerald wrote:
> Dear Experts,
> I have successfully got protege-OWL to run within Eclipse as described by :
> However, I cannot get SWRL to run.
> I copied the jess.jar file into the "protege-owl/plugins/edu.stanford.smi.protegex.owl" directory
> and added it as a jar in the Eclipse build path.
> Note I had to use the "Add External Jars" option in Eclipse as it complained about an output
> directory when I tried to use the "Add Jars" option. The complaint was:
> "Cannot nest 'protege-owl/plugins/...ns/edu.stanford.smi.protegex.owl'"
> When I create a simple ontology as test, I can add the SWRLTab. However the SWRLTab only has the
> SQWRL Query Tab icon (top right hand side of SWRLtab) and does not have the rules icon. Note if I do
> not add the jess.jar using the "Add External Jars" option I will not see the SQWRL Query Tab icon.
> Note also that, I can create rules and queries I just can not execute them.
> On clicking the SQWRL Query Tab icon I get the following message:
> "SWRLJessBridge load failed - could not find class
> edu.stanford.smi.protegex.owl.swrl.bridge.exceptions.NoRegisteredBridgesException: no registered
> bridges"
> I am running Eclipse Galileo on a Ubuntu 9.04 with java version "1.6.0_16"
> How do I resolve this issue?
> regards,
> Will.
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