IncrementalExecutor

[SergeyAmirkhanyan]

I try to execute the next code

#include "TMath.h"
#include "TH1.h"
#include "iostream"
using namespace std;

void File()
{
    TFile f("myfile.root", "CREATE");
    TH1F* h = new TH1F("h", "h", 64, -4, 4);

 h->FillRandom("gaus");
h->Write();
    TH1F* myHist;
    f.GetObject("h", myHist);
    myHist->Draw();
    f.Close();
}

But there emerged such a problem

IncrementalExecutor::executeFunction: symbol ‘_ZN6TClass8GetClassI4TH1FEEPS_bb’ unresolved while linking [cling interface function]!
You are probably missing the definition of TClass* TClass::GetClass(bool, bool)
Maybe you need to load the corresponding shared library?

What should I do ?

[couet]

It works for me:

File.C:

#include "TMath.h"
#include "TH1.h"
#include "iostream"
using namespace std;

void File()
{
   TFile f("myfile.root", "CREATE");
   TH1F* h = new TH1F("h", "h", 64, -4, 4);

   h->FillRandom("gaus");
   h->Write();
   TH1F* myHist;
   f.GetObject("h", myHist);
   myHist->Draw();
   f.Close();
}

root [0] .x File.C
Processing File.C...
Info in <TCanvas::MakeDefCanvas>:  created default TCanvas with name c1
root [1] 

[Axel]

This looks like an inconsistent build or setup of ROOT, where you mix versions. Can you send the output of .files and gInterpreter->GetSharedLibs()?

[Wile_E_Coyote]

I guess you want:
TFile f("myfile.root", "RECREATE");
and:
myHist->SetDirectory(gROOT); // before closing "f"