Comment 3 for bug 1684289

Thanks,

Looks like a problem in the pythia8 interface.
Here is the patch:
=== modified file 'madgraph/interface/madevent_interface.py'
--- madgraph/interface/madevent_interface.py 2017-04-12 13:04:38 +0000
+++ madgraph/interface/madevent_interface.py 2017-04-26 07:32:09 +0000
@@ -1066,7 +1066,7 @@
         input_file = pjoin(self.me_dir,'Events',self.run_name, 'unweighted_events.lhe')
         if not os.path.exists('%s.gz'%input_file):
             if os.path.exists(input_file):
- misc.gzip(input_file, keep=True, stdout='%s.gz'%input_file)
+ misc.gzip(input_file, stdout='%s.gz'%input_file)
             else:
                 raise self.InvalidCmd('No event file corresponding to %s run. '
                                                                 % self.run_name)

Thanks,

Olivier