Hi Miro, You do not mention which version you use. With the current version 2.25, your simple test works OK. Note that we are just polishing version 2.25/03 and expect to announce it tonight. Rene Brun Miroslav Helbich wrote: > > Hi Rooters, > > I can't call TH3::Project3D() and ProjectionZ() methods. However some > others like TH3::FitSlices() work. What is the problem? > > Miro Helbich > > Example is in this macro: > { > h3 = new TH3D("h3","h3 test",10,0.,1.,10,0.,1.,10,0.,1.); > h3->FillRandom("pol1",1000); > h3->Draw(); > // h3->ProjectionZ(); > // h3->Project3D("xy"); > h3->Project3D("xy")->Draw(); > } > > And here is the output > > root [23] .x bug.C > Warning in <TH1::Build>: Replacing existing histogram: h3 > Error: Can't call TH3D::Project3D() in current scope > FILE:/nevis11/helbich/lrec/eval/./bug.C LINE:7 > *** Interpreter error recovered ***
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