RooDataSet Error

ROOT
#1

Hi,

I have a Roofit example found somewhere.
The following is the code fragment to import the variables in the TNtuple into RooDataSet.

{
        gSystem->Load("libRooFit");
        using namespace RooFit;

        // Create variables to load from the ntuple.
        RooRealVar Dmode("Dmode", "decay mode of D candidate", -1, 1000);
        RooRealVar DdeltaE("DdeltaE", "delta E of D candidate", -0.1, 0.1, "GeV")
;
        RooArgSet ntupleVarSet(Dmode, DdeltaE);

        TFile* file1 = new TFile("data33.root");
        TTree* tree1 = file1->Get("RooFitExampleProc/nt1");
        RooDataSet dataSet("ntuple_of_D_candidates", "ntuple of D candidate", tree1, ntupleVarSet);
}

When I run it, the code issue the following message.

How can I import the variables without the error message?
I attached root file.

Thanks in advance.
data33.root (179 KB)

#2

There seems to be no problem in importing
In spite of the above error message.

I can plot the dataset.

I could know it after I modified the roofit code not to issue the message like this.
:frowning:

roofit_patch.txt (1.63 KB)

#3

Hi,

I’ll have a look at this.

Can you tell me which ROOT version you are using and what
the actual branch types are in the tree you are attempting
to import?

Wouter

#4

Thanks, Wouter

I’m using ROOT of version 5.10 with RooFit of v2.07.
All branch types in tree are ‘Float_t’(float).