allowed error codes on Register Document Set transaction are XDSRegistryError, XDSRegistryDuplicateUniqueIdInMessage, XDSRepositoryDuplicateUniqueIdInMessage, XDSDuplicateUniqueIdInRegistry, XDSNonIdenticalHash, XDSRegistryBusy, XDSRegistryOutOfResources, XDSRegistryMetadataError, XDSRepositoryMetadataError, XDSExtraMetadataNotSaved, XDSUnknownPatientId, XDSPatientIdDoesNotMatch, XDSRegistryDeprecatedDocumentError (IHE_ITI_TF_Rev8-0_Vol3_FT Table 4.1-11)