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Hallo folks, I have been chasing small adjustments in the skims and I have found that there are a few cuts that are slightly tighter in the skims, but should be safe (for istance we are not applying the P*<2.5GeV cut on the D mesons while making the timestamps). This makes the comparison more difficult since the number of events do not necessarily match. The only way to evaluate if the skims are efficient is to skim out reduced collections, run the whole analysis on both and make sure the signal is the same. I am running on the following collections: /users/rfaccini/SemiExcl/Dc/092801/superblock1/2000_b1-s6/aa /users/rfaccini/SemiExcl/D0/110901/superblock1/2000_b1-s6/aa /users/rfaccini/SemiExcl/Dstar0/110901/superblock1/2000_b1-s6/aa and creating the skimmed collections: /users/rfaccini/testSkims/Dc/120501 /users/rfaccini/testSkims/D0/120501 /users/rfaccini/testSkims/Dstar0/120501 respectively (i.e. each job runs on 1 collections and has 1 collection in output). Here I am only testing the superblock1 skims (since I have tested that the relative yield among is fine) and I would like to know that the yield in Ibu for superblock1 is the same on the two collections. As you can see the D*+ are missing: somehow my jobs keep bombing there ciao ric P.S. jobs are still running, but I am going home ... they should be ready in a couple of hours