Hi, I have a problem with an warning message... I must confess I ignored it until I needed to Write new histograms... The message is: WARNING, class:TLeaf StreamerInfo read from file:r97.root has the same version:2 than the active class but a different checksum. You should update the version to ClassDef(TLeaf,3). Do not try to write objects with the current class definition, the files will not be readable. How do I "update the version to ClassDef(TLeaf,3)" ? Do I need to get rid of the streamer or something like that ? The r97.root has been obtained by h2root a r97.rz file and I am calling it this way: TFile *r97 = new TFile("r97.root") ; Any Idea ? Cheers.. ------------------------------------------------------------ Reinhardt CHAMONAL The University of Edinburgh Dept. of Physics & Astronomy email: chamonal@ph.ed.ac.uk King's Buildings, JCMB, 5301 Mayfield Road phone: +44-131-650 5307 Edinburgh, EH9 3JZ web: http://www.ph.ed.ac.uk/~chamonal/ http://www.reuh.fr.st ------------------------------------------------------------
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