If you have an event and would like to get the hits on COT tracks into a roottuple, you can do the following in cdfsoft2 release 4.10.4 or greater: Edit TrackingMods/test/validate_CT_Reconstruction.tcl to put in your input file, and take away the pound sign in front of `mod disable CT_Simulation' (if you are not using MC). Also, add WriteHits set t under `module talk CT_TrackingModule.' Now do: CT_Reconstruction validate_CT_Reconstruction.tcl >& output.log TrackingMods/test/makehits.csh root TrackingMods/test/makent.C --- You should now have a roottuple with the hits and the tracks in the event. You can edit makent.C to change the information that goes into the roottuple.