Code works (but with strange output) TTree

Hello!

I recently generated a .lhe file from PYTHIA (generator of h.e.p. events) and then i converted it into .root through the ExRootLHEFConverter. After generating it, I started my studies with TTree. My code works fine, I can even generate the histograms I want, however, I get the following output:

Warning in <TClass::TClass>: no dictionary for class TRootLHEFEvent is available
Warning in <TClass::TClass>: no dictionary for class TRootWeight is available
Warning in <TClass::TClass>: no dictionary for class TRootLHEFParticle is available
Warning in <TClass::TClass>: no dictionary for class TSortableObject is available

What could this be? I am new here and I really don’t know if it’s a problem from ROOT

My code is attached

Thanks!
r_Z_tree.cc (5.0 KB)

Hi,

the dictionaries for those classes are missing. The libraries which were used by “ExRootLHEFConverter” need to be in the LD_LIBRARY_PATH as well as the associated rootmap files.

Cheers,
D

1 Like

Now I see how it works. Thanks!

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