message: fixed PostData issue
diff: @@ -216,6 +216,10 @@ for(int iHisto=0; iHisto<3; iHisto++){
  fHistEvPlane[iDet] = nullptr;
  }
  +
  + DefineInput(0, TChain::Class()); // define the input of the analysis: in this case we take a 'chain' of events
  + DefineOutput(1, TList::Class()); // define the ouptut of the analysis: in this case it's a list of histograms
  +
  }
  