    org.hl7.fhir.exceptions.DefinitionException: Unable to find definition for CodeableReference
    	at org.hl7.fhir.r5.utils.DefinitionNavigator.loadTypedChildren(DefinitionNavigator.java:385)
    	at org.hl7.fhir.r5.utils.DefinitionNavigator.hasTypeChildren(DefinitionNavigator.java:373)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compareChildren(StructureDefinitionComparer.java:362)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compareElements(StructureDefinitionComparer.java:286)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compareChildren(StructureDefinitionComparer.java:377)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compareElements(StructureDefinitionComparer.java:286)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compareChildren(StructureDefinitionComparer.java:377)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compareElements(StructureDefinitionComparer.java:286)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compare(StructureDefinitionComparer.java:164)
    	at org.hl7.fhir.r5.comparison.ComparisonSession.compare(ComparisonSession.java:107)
    	at org.hl7.fhir.igtools.publisher.comparators.IpsComparator.finishChecks(IpsComparator.java:233)
    	at org.hl7.fhir.igtools.publisher.PublisherProcessor.checkConformanceResources(PublisherProcessor.java:1502)
    	at org.hl7.fhir.igtools.publisher.PublisherProcessor.loadConformance2(PublisherProcessor.java:104)
    	at org.hl7.fhir.igtools.publisher.Publisher.createIg(Publisher.java:404)
    	at org.hl7.fhir.igtools.publisher.Publisher.execute(Publisher.java:233)
    	at org.hl7.fhir.igtools.publisher.Publisher.main(Publisher.java:1600)
    	at org.hl7.fhir.igtools.web.PublicationProcess.runBuild(PublicationProcess.java:1214)
    	at org.hl7.fhir.igtools.web.PublicationProcess.doPublish(PublicationProcess.java:615)
    	at org.hl7.fhir.igtools.web.PublicationProcess.publishInner2(PublicationProcess.java:512)
    	at org.hl7.fhir.igtools.web.PublicationProcess.publishInner(PublicationProcess.java:283)
    	at org.hl7.fhir.igtools.web.PublicationProcess.publish(PublicationProcess.java:138)
    	at org.hl7.fhir.igtools.publisher.Publisher.main(Publisher.java:1339)