(642e89d)
ca.phon.opgraph.exceptions.RequiredInputException: Required field 'collection' in node '642e89d' has no input
	at ca.phon.opgraph.Processor.checkInputs(Processor.java:594)
	at ca.phon.opgraph.Processor.setupInputs(Processor.java:522)
	at ca.phon.opgraph.Processor.processCurrentNode(Processor.java:324)
	at ca.phon.opgraph.Processor.step(Processor.java:300)
	at ca.phon.opgraph.Processor.stepAll(Processor.java:493)
	at ca.phon.opgraph.Processor.stepAll(Processor.java:506)
	at ca.phon.opgraph.nodes.phonex.PhonexFindNode.operate(PhonexFindNode.java:88)
	at ca.phon.opgraph.Processor.processCurrentNode(Processor.java:339)
	at ca.phon.opgraph.Processor.step(Processor.java:300)
	at ca.phon.opgraph.Processor.stepAll(Processor.java:493)
	at ca.phon.opgraph.Processor.stepAll(Processor.java:506)
	at ca.phon.opgraph.nodes.general.MacroNode.operate(MacroNode.java:197)
	at ca.phon.opgraph.Processor.processCurrentNode(Processor.java:339)
	at ca.phon.opgraph.Processor.step(Processor.java:300)
	at ca.phon.opgraph.Processor.stepAll(Processor.java:493)
	at ca.phon.opgraph.Processor.stepAll(Processor.java:506)
	at ca.phon.syllabifier.opgraph.OpGraphSyllabifier.syllabify(OpGraphSyllabifier.java:101)
	at ca.phon.session.check.CheckTranscripts.checkSession(CheckTranscripts.java:98)
	at ca.phon.session.check.SessionValidator.validate(SessionValidator.java:86)
	at ca.phon.app.opgraph.nodes.SessionCheckNode.operate(SessionCheckNode.java:157)
	at ca.phon.opgraph.Processor.processCurrentNode(Processor.java:339)
	at ca.phon.opgraph.Processor.step(Processor.java:300)
	at ca.phon.opgraph.Processor.stepAll(Processor.java:493)
	at ca.phon.opgraph.Processor.stepAll(Processor.java:506)
	at ca.phon.opgraph.nodes.reflect.IterableClassNode.operate(IterableClassNode.java:204)
	at ca.phon.opgraph.Processor.processCurrentNode(Processor.java:339)
	at ca.phon.opgraph.Processor.step(Processor.java:300)
	at ca.phon.opgraph.Processor.stepAll(Processor.java:493)
	at ca.phon.opgraph.Processor.stepAll(Processor.java:506)
	at ca.phon.app.opgraph.wizard.NodeWizard.executeGraph(NodeWizard.java:987)
	at ca.phon.app.opgraph.wizard.NodeWizard.lambda$gotoStep$17(NodeWizard.java:1396)
	at ca.phon.worker.PhonWorker.run(PhonWorker.java:177)