Reactome: A Curated Pathway Database
------------- EXCEPTION: Bio::Root::Exception -------------
MSG: Need class.
STACK: Error::throw
STACK: Bio::Root::Root::throw /usr/share/perl5/Bio/Root/Root.pm:472
STACK: GKB::Ontology::is_multivalue_class_attribute /usr/local/gkb/modules/GKB/Ontology.pm:588
STACK: GKB::DBAdaptor::fetch_multiple_attributes_values /usr/local/gkb/modules/GKB/DBAdaptor.pm:2558
STACK: GKB::DBAdaptor::fetch_all_class_instances_as_shells /usr/local/gkb/modules/GKB/DBAdaptor.pm:2659
STACK: /usr/local/gkb/website/cgi-bin/instancebrowser:93
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