Bug: do not initialize SosModel with empty scenarios / narratives array
Bug: do not initialize SosModel with empty scenarios / narratives array

willu47/smif,tomalrussell/smif,tomalrussell/smif,nismod/smif,willu47/smif,willu47/smif,willu47/smif,nismod/smif,tomalrussell/smif,nismod/smif,nismod/smif,tomalrussell/smif