Use string values for RelativeTimestep
Use string values for RelativeTimestep

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