Hi Sebastien, I have no problems in browsing your file and viewing your histograms. I tried with versions 3.05/07 and 3.10/01 (both gcc296 and gcc3.2) I suspect a mismatch with your PATH/LD_LIBRARY_PATH. To look at the problem, run under gdb as explained at: http://root.cern.ch/root/roottalk/RoottalkRules.html Rene Brun Sebastien Greder wrote: > > Hello, > > I produced some basic histos and wrote them in a root file. > every thing runs well but when I open the root file I get a strange > (i.e difficult to translate !) message : > > sbgpcs36:~/analyse/my_analyze/current/d0/current_analyze $ root -l > LightDataTaggingEfficiency.root > root [0] > Attaching file LightDataTaggingEfficiency.root... > root [1] new TBrowser > (class TBrowser*)0x85b1968 > root [2] > *** Break *** segmentation violation > Generating stack trace... > 0x401ede47 in TUnixSystem::StackTrace(void) + 0x29b from > /cern/2003/root.3.05.07//lib/libCore.so > 0x401ec74f in TUnixSystem::DispatchSignals(ESignals) + 0xc3 from > /cern/2003/root.3.05.07//lib/libCore.so > 0x401eb780 in <unknown> from /cern/2003/root.3.05.07//lib/libCore.so > 0x401ef747 in <unknown> from /cern/2003/root.3.05.07//lib/libCore.so > 0x40f02ac5 in <unknown> from /lib/i686/libpthread.so.0 > 0x40fa2948 in <unknown> from /lib/i686/libc.so.6 > 0x00000000 in <unknown function> > Root > <TCanvas::MakeDefCanvas>: created default TCanvas with name c1 > > I put the root file on : > > /afs/in2p3.fr/home/g/greder/public > > By the way is there a way to decode the above message (tools, things > one could directly look at if there is a specific message ?) > I don't understand were the null pointer comes from > (0x00000000 in <unknown function>) > > i'm running with : > > Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs > gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-98) > > and root version 3.05.07 > > thanks, > > seb. > > the piece of code to save the histos (they were built correctly) > > TFile outputfile(fOutputFileName.Data(),"recreate"); > > TObjString ainputfile(inputfilename); ainputfile.Write(); > > hNegDataTaggingEfficiencyVsPt -> Write(); > hPosDataTaggingEfficiencyVsPt -> Write(); > hNegDataTaggingEfficiencyVsEta -> Write(); > hPosDataTaggingEfficiencyVsEta -> Write(); > > outputfile.Close(); > > --------------------------------------------------------------------- > | Sebastien GREDER tel : +33 (0)3 88 10 63 54 | > | D0 Strasbourg, | > | Institut de Recherches Subatomiques fax : +33 (0)3 88 10 62 34 | > | 23, rue du loess - BP 28 secr : +33 (0)3 88 10 66 40 | > | F-67037- STRASBOURG cedex 2 e-mail : greder@in2p3.fr, | > | greder@fnal.gov | > ---------------------------------------------------------------------
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