improve warning message

skycatalogs/skyCatalogs.py

@@ -336,7 +336,7 @@ def __init__(self, config, mp=False, skycatalog_root=None, verbose=False,
             self._sso_sed_factory = SsoSedFactory(self._sso_sed_path)
             if not self._sso_sed_factory:
                 self._logger.warning('SSO appear in the list of available object types but supporting files do not exist')
-                self._logger.warning('SSOs will not be present in object lists')
+                self._logger.warning('SSOs will not be simulated')
         self._extinguisher = MilkyWayExtinction()
 
         # Make our properties accessible to BaseObject, etc.