    org.hl7.fhir.exceptions.DefinitionException: StructureDefinition is not for an profile - can't be compared (left: CWTPayload)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.check(StructureDefinitionComparer.java:193)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compare(StructureDefinitionComparer.java:129)
    	at org.hl7.fhir.r5.comparison.ComparisonSession.compare(ComparisonSession.java:107)
    	at org.hl7.fhir.igtools.publisher.comparators.PreviousVersionComparator.finishChecks(PreviousVersionComparator.java:262)
    	at org.hl7.fhir.igtools.publisher.Publisher.checkConformanceResources(Publisher.java:6571)
    	at org.hl7.fhir.igtools.publisher.Publisher.loadConformance2(Publisher.java:6377)
    	at org.hl7.fhir.igtools.publisher.Publisher.createIg(Publisher.java:1224)
    	at org.hl7.fhir.igtools.publisher.Publisher.execute(Publisher.java:1083)
    	at org.hl7.fhir.igtools.publisher.Publisher.main(Publisher.java:15399)