[protege-discussion] could not activate SWRLTab: java.lang.Nullpointerexception

[zhang weishan]

Dear all,
  It seems that that the SWRLTab could not be activated with a big OWL ontology or imports several ontologies that forms a big one. 
Got this error even after checking that the ontology is consistent. 'could not activate SWRLTab: java.lang.Nullpointerexception'.  This happened also if there are 'equivalentClass' for my ontology.
  
  Any way around or solutions? 

  Best regards,
  Weishan


       
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