diff --git a/analyses/pluginALICE/ALICE_2012_I1126966.cc b/analyses/pluginALICE/ALICE_2012_I1126966.cc
--- a/analyses/pluginALICE/ALICE_2012_I1126966.cc
+++ b/analyses/pluginALICE/ALICE_2012_I1126966.cc
@@ -1,151 +1,151 @@
 //-*- C++ -*-
 #include "Rivet/Projections/CentralityProjection.hh"
 #include "Rivet/Projections/AliceCommon.hh"
 #include "Rivet/Tools/AliceCommon.hh"
 #include "Rivet/Tools/Cuts.hh"
 
 namespace Rivet {
   
   
   /// Pion, Kaon, and Proton Production in 0-5%
   ///  central Pb--Pb Collisions at 2.76 TeV
   class ALICE_2012_I1126966 : public Analysis {
   public:
     
     /// Constructor
     DEFAULT_RIVET_ANALYSIS_CTOR(ALICE_2012_I1126966);
     
     /// Book histograms and initialise projections before the run
     void init() {
       // Particles of interest.
       declare(ALICE::PrimaryParticles(Cuts::absrap < 0.5),"CFS"); 
 
       // The event trigger.
       declare(ALICE::V0AndTrigger(), "V0-AND");
       // The centrality projection.
       declareCentrality(ALICE::V0MMultiplicity(),
            "ALICE_2015_PBPBCentrality", "V0M", "V0M");
 
       // Invariant pT distributions.
       _histPtPi = bookHisto1D("d01-x01-y01"); //pi+
       _histPtPibar = bookHisto1D("d01-x01-y02");// pi-
       _histPtKaon = bookHisto1D("d02-x01-y01"); //K+
       _histPtKaonbar = bookHisto1D("d02-x01-y02"); //K-
       _histPtProton = bookHisto1D("d03-x01-y01"); //P+
       _histPtProtonbar = bookHisto1D("d03-x01-y02"); //P-
       // Yield histograms.
       _histNpi = bookHisto1D("d04-x01-y01");
       _histNpibar = bookHisto1D("d04-x01-y02");
       _histNKaon = bookHisto1D("d04-x01-y03");
       _histNKaonbar = bookHisto1D("d04-x01-y04");
       _histNproton = bookHisto1D("d04-x01-y05");
       _histNprotonbar =bookHisto1D("d04-x01-y06");
       // Sum of weights of triggered events.
       sow = bookCounter("sow");
 
   }
     
       /// Perform the per-event analysis
     
     void analyze(const Event& event) {
       // Event weight.
       const double weight = event.weight();
       // Analysis only considers 0-5% central events
       if (apply<CentralityProjection>(event,"V0M")() > 5.0)
         vetoEvent;
       // Event trigger.
       if (!apply<ALICE::V0AndTrigger>(event, "V0-AND")() ) vetoEvent;
       
       sow->fill(weight);
       // ID particles counters for this event.
       int Npi=0;
       int Npibar=0;
       int NKaon=0;
       int NKaonbar=0;
       int Nproton=0;
       int Nprotonbar=0;
 
       for (const auto& p : 
 	apply<ALICE::PrimaryParticles>(event,"CFS").particles()) {
           const double pWeight = weight / p.pT() / 2. / M_PI;	      
           switch (p.pid()) {
             case 211: // pi+
 	      Npi++;
               _histPtPi->fill(p.pT()/GeV,  pWeight);
               break;
 	    case -211: //pi-
 	      Npibar++;
 	      _histPtPibar->fill(p.pT()/GeV, pWeight);
               break;
             case 2212: // proton
 	      Nproton++;
               _histPtProton->fill(p.pT()/GeV, pWeight);
 	      break;
 	    case -2212: // p-bar
 	      Nprotonbar++;
               _histPtProtonbar->fill(p.pT()/GeV, pWeight);
               break;
             case 321: // K+
 	      NKaon++;
               _histPtKaon->fill(p.pT()/GeV,  pWeight);
 	      break;
 	    case -321: // K-
 	      NKaonbar++;
               _histPtKaonbar->fill(p.pT()/GeV,  pWeight);
              break;
         }
       } // Particle loop ends.
 
       // Fill yield histograms.
 
-      _histNpi->fill(Npi, weight);
-      _histNpibar->fill(Npibar, weight);
-      _histNKaon->fill(NKaon, weight);
-      _histNKaonbar->fill(NKaonbar, weight);
-      _histNproton->fill(Nproton, weight);
-      _histNprotonbar->fill(Nprotonbar, weight);
+      _histNpi->fill(0.0, Npi, weight);
+      _histNpibar->fill(0.0, Npibar, weight);
+      _histNKaon->fill(0.0, NKaon, weight);
+      _histNKaonbar->fill(0.0, NKaonbar, weight);
+      _histNproton->fill(0.0, Nproton, weight);
+      _histNprotonbar->fill(0.0, Nprotonbar, weight);
     }
 
 
     void finalize() {
        const double s = 1./sow->sumW();
        _histPtPi->scaleW(s);
        _histPtPibar->scaleW(s);
        _histPtKaon->scaleW(s);
        _histPtKaonbar->scaleW(s);
        _histPtProton->scaleW(s);
        _histPtProtonbar->scaleW(s);
        _histNpi->scaleW(s);
        _histNpibar->scaleW(s);
        _histNKaon->scaleW(s);
        _histNKaonbar->scaleW(s);
        _histNproton->scaleW(s);
        _histNprotonbar->scaleW(s);
 
 }
     
   private:
     
       // pT histograms
     Histo1DPtr _histPtPi;
     Histo1DPtr _histPtKaon;
     Histo1DPtr _histPtProton;
     Histo1DPtr _histPtPibar;
     Histo1DPtr _histPtKaonbar;
     Histo1DPtr _histPtProtonbar;
     Histo1DPtr _histNpi;
     Histo1DPtr _histNpibar;
     Histo1DPtr _histNKaon;
     Histo1DPtr _histNKaonbar;
     Histo1DPtr _histNproton;
     Histo1DPtr _histNprotonbar;
     CounterPtr sow;
 
   };
   
   
     // The hook for the plugin system
   DECLARE_RIVET_PLUGIN(ALICE_2012_I1126966);
   
   
 }