Comment 3 for bug 2054883

Can you check what happens with simple "p p > e+ e-" runs?
And also rivet_card.dat in /home/abdul/Madgraph_v3.4.2/MG5_aMC_v3_4_2/signal_energy_1900_U/Cards directory? Looks like banner does not copy the rivet info.

I can test some time this week but my naive guess is that it has to do with photon initial state ("a a >")