Hello, I am using Root 4.00/03 compiled with win32gdk on a Win XP system. I am executing a self compiled program (using visual c++ 6)that basicaly open an already existing file and get a TTree from it: // #include <string.h> #include <stdlib.h> #include <Riostream.h> #include <stddef.h> #include "TROOT.h" #include "TApplication.h" #include "TH1.h" #include "TTree.h" #include "TFile.h" #define INPUTFILE "c:/lxplus/scratch0/Neutralino_000004_1_100000.root" int main(int argc, char* argv[]) { TH1F h1("h1","h1",10,0,10); TFile f(INPUTFILE); f.ls(); f.cd("CBNT"); gDirectory->ls(); TTree* t1=(TTree*) gDirectory->Get("t3333"); return 0; } The code compile fine without errors messages, but when I execute it I get the following errors and I cannot access the tree stored in the file: >Warning in <TClass::TClass>: no dictionary for class TTree is available >Warning in <TClass::TClass>: no dictionary for class TBranch is available >Warning in <TClass::TClass>: no dictionary for class TLeafI is available >Warning in <TClass::TClass>: no dictionary for class TLeaf is available >Warning in <TClass::TClass>: no dictionary for class TLeafF is available >TFile** c:/lxplus/scratch0/Neutralino_000004_1_100000.root Athena Trees > TFile* c:/lxplus/scratch0/Neutralino_000004_1_100000.root Athena Trees > KEY: TDirectory Atlfast;1 Atlfast > KEY: TDirectory CBNT;1 CBNT >TDirectory* CBNT CBNT > KEY: TTree t3333;1 Combined Ntuple >Error in <TBuffer::CheckByteCount>: object of class TNamed read too few >bytes: 26 instead of 1077290 At the link stage, I have specified the following libraries: libCore.lib libCint.lib libHist.lib libGraf.lib libGraf3d.lib libGpad.lib libTree.lib libRint.lib libPostscript.lib libMatrix.lib libPhysics.lib I've found in the roottalk database mails from peoples that were having such error messages (on MacOSX) but I was not able to find a solution from these. I am just starting using visual c++ and I am not an expert. Have I missed something evident ? Thanks in advance, Damien.
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