Mergetree shows 4 trees, howver inly the last pixel entries are present

Time walk correction/TreeTest.C

 //TFile* TPfile = new TFile("TP.root","update");
-TList* TPlist = new TList;
+//TList* TPlist = new TList;
 
 void TreeEnergyWrite(){
 
@@ -98,7 +98,7 @@ void TreeTPWrite(int c, int r){
 
   //Add new trees (incl voltage col) to list and merge the trees
 
-  //TList* TPlist = new TList;
+  TList* TPlist = new TList;
   std::cout << " The tree for the pixel " <<  c <<  " and " << r << " is added to the list " << std::endl;
   TPlist->Add(TPtree);
   TTree* newtree = TTree::MergeTrees(TPlist);
@@ -107,7 +107,7 @@ void TreeTPWrite(int c, int r){
   newtree->SetDirectory(TPfile);
   // Mergedtree = TTree::MergeTrees(TPlist); 
   // Mergedtree->Write("",TObject::kWriteDelete);
-   newtree->Write("",TObject::kWriteDelete);
+  newtree->Write("",TObject::kWriteDelete);
 
   TPfile->Close();
   //Efile->Close();
@@ -125,7 +125,7 @@ void TreeTest(){
     }
   }
 
-  std::cout <<" The size of the tree list is " << TPlist->GetSize() << std::endl;
+  //std::cout <<" The size of the tree list is " << TPlist->GetSize() << std::endl;
   //TPfile->Close();
 
 }