Hoi Daniele, > Actually it seems that the PID killing is not applied at all for > the muons. It seems from the logfiles that muon PidKilling has been run on the Beta level. It is done in the same way as for electrons. We know "for sure" that 1) the normal muon id has NOT run: AppAST: 0.00 | 0 | 0.00 | 0.00000 | 0.00 |MinimumIoniziongMuonMicroSelection AppAST: 0.00 | 0 | 0.00 | 0.00000 | 0.00 |VeryLooseMuonMicroSelection AppAST: 0.01 | 0 | 0.00 | 0.00000 | 0.00 |LooseMuonMicroSelection AppAST: 0.00 | 0 | 0.00 | 0.00000 | 0.00 |TightMuonMicroSelection AppAST: 0.00 | 0 | 0.00 | 0.00000 | 0.00 |VeryTightMuonMicroSelection AppAST: 0.00 | 0 | 0.00 | 0.00000 | 0.00 |MuonMicroDispatch 2) BtaMicroPidKilling thinks it has to kill electrons and muons: BtaMicroPidKilling:Kill Electrons set on BtaMicroPidKilling:Kill Muons set on All this is visible in the output of the executable, i.e. not only from the output of various 'mod talk ... show ...'. The message about "no comments" is just a warning statement, and cannot be changed since the hadron people have produced PidTables without comments. The numbers in the PidTables seem reasonable. The no-comment tables concern only the muon misidentification tables, not the efficiency tables. Another possibility would be that the Beta jobs were run with the wrong symlinks 'pidtables', but at least in that subset I checked for cocktail MC, it seems that those links were set up correctly. Cheers, --U.