Hi, the skimData command line is: skimData -s BToDstarSemiExcl -G good14.txt --onpeak -tcl 10000,1 --basename prova/BToDstar_14_ and the .tcl file look like: input add /groups/skims/AllEvents/0001/1300/P10.2.3gV03fb/00011338/cb003/Skim1044aObjy/P0000/Breco/BToDstarSemiExcl luigi