Fixed bug in DelphesReader with empty Delphes ROOT files
@@ -696,7 +696,7 @@ class DelphesReader:
# No events found?
if this_observations is None:
logger.debug("No observations in this Delphes file, skipping it")
- return None, None
+ return None, None, None
if this_weights is not None:
logger.debug("Found weights %s in Delphes file", list(this_weights.keys()))
