    org.hl7.fhir.exceptions.DefinitionException: StructureDefinition is not for an profile - can't be compared (left: HCert)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.check(StructureDefinitionComparer.java:187)
    	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compare(StructureDefinitionComparer.java:121)
    	at org.hl7.fhir.r5.comparison.ComparisonSession.compare(ComparisonSession.java:106)
    	at org.hl7.fhir.igtools.publisher.comparators.PreviousVersionComparator.finishChecks(PreviousVersionComparator.java:268)
    	at org.hl7.fhir.igtools.publisher.PublisherProcessor.checkConformanceResources(PublisherProcessor.java:1511)
    	at org.hl7.fhir.igtools.publisher.PublisherProcessor.loadConformance2(PublisherProcessor.java:103)
    	at org.hl7.fhir.igtools.publisher.Publisher.createIg(Publisher.java:397)
    	at org.hl7.fhir.igtools.publisher.Publisher.execute(Publisher.java:226)
    	at org.hl7.fhir.igtools.publisher.Publisher.main(Publisher.java:1601)