Hi I improved the CatalogBuilder to be more robust but Catalog entry of ConfigurationOfPunQLite is broken ==== Startup Error: MessageNotUnderstood: ByteString>>put: ByteString(Object)>>doesNotUnderstand: #put: ConfigurationOfPunQLite class>>catalogKeyClassesAndExample CatalogBuilder>>buildKeyClassesFor:on: CatalogBuilder>>catalogCardBodyFor: in Block: [:s | ... Thanks