Extension point not defined: [email protected]

[donpellegrino]

When the SQWRLTab tab is added to Protege 5.2.0 via the Window -> Tabs -> SQWRLTab menu item, the following is output to the terminal:

"Extension point not defined: [email protected]"

Test System:
------------------------------------ Protege -----------------------------------
Protege Desktop
Version 5.2.0, Build
----------------------------------- Platform -----------------------------------
Java: JVM 1.8.0_40-b26 Memory: 466M
Language: en, Country: US
Framework: Apache Software Foundation (1.7)
OS: linux (3.10.0-693.2.2.el7.x86_64)
Processor: x86-64
------------------------------------ Plugins -----------------------------------
Plugin: Cellfie Protege 5.0+ Plugin (2.1.0)
Plugin: OWL Code Generation Plug-in (2.0.0)
Plugin: Existential Query (2.0.0)
Plugin: Explanation Workbench (3.0.0)
Plugin: OntoGraf (2.0.3)
Plugin: DL Query (4.0.1)
Plugin: HermiT (1.3.8.413)
Plugin: Browser View (OWLDoc) (3.0.3)
Plugin: OWLViz (5.0.3)
Plugin: OWLAPI RDF Library (2.0.3)
Plugin: SPARQL Query Plugin (2.0.2)
Plugin: OWL Difference (6.0.2)
Plugin: Ontology Debugger (0.1.4.BETA)
Plugin: OBO Annotations Editor (0.4.0)
Plugin: SWRLTab Protege 5.0+ Plugin (2.0.4)