    org.hl7.fhir.exceptions.DefinitionException: StructureDefinition is not for an profile - can't be compared (left: CWT)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.check(StructureDefinitionComparer.java:190)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compare(StructureDefinitionComparer.java:126)
    	at org.hl7.fhir.r5.comparison.ComparisonSession.compare(ComparisonSession.java:100)
    	at org.hl7.fhir.igtools.publisher.comparators.PreviousVersionComparator.finishChecks(PreviousVersionComparator.java:257)
    	at org.hl7.fhir.igtools.publisher.Publisher.checkConformanceResources(Publisher.java:5671)
    	at org.hl7.fhir.igtools.publisher.Publisher.loadConformance(Publisher.java:5487)
    	at org.hl7.fhir.igtools.publisher.Publisher.createIg(Publisher.java:1149)
    	at org.hl7.fhir.igtools.publisher.Publisher.execute(Publisher.java:994)
    	at org.hl7.fhir.igtools.publisher.Publisher.main(Publisher.java:12543)