Looping over irow and icol and not TTree for fitting and plotting, Correct...

Looping over irow and icol and not TTree for fitting and plotting, Correct values are coutted, but still print s255,255 for col, row in the fitparametrs.txt file

Time walk correction/TreeTest.C

@@ -121,16 +121,16 @@ void timewalkfit(){
   TPtree->SetBranchAddress("toa_var",&toa_var);
 
 
-  for(int i = 0; i < TPtree->GetEntries(); i++){
+  for(int icol = 0; icol < 256; icol++){
+    for (int irow = 0; irow <256; irow++){
 
-    TPtree->GetEntry(i);
-    std::cout << col << " " << row << std::endl; //Correct values of col and row printed
+      std::cout <<icol << " " << irow << std::endl;
 
-    auto N = TPtree->Draw("voltage:toa:sqrt(toa_var)",Form("col==(%i) && row==(%i) && toa>0 && toa<toa_cut", col, row),"goff");
+      auto N = TPtree->Draw("voltage:toa:sqrt(toa_var)",Form("col==(%i) && row==(%i) && toa>0 && toa<toa_cut", icol, irow),"goff");
       // cout << N <<std::endl;
       TGraphErrors *graph = new TGraphErrors(N,TPtree->GetV1(),TPtree->GetV2(),0,TPtree->GetV3());
 
-    // std::cout << col << " " << row << std::endl; // Always printing 255 255
+      std::cout << icol << " " << irow << std::endl; //Correct values printed here..but text file still prints 255_255
     
       auto fitmin = TMath::MinElement(graph->GetN(),graph->GetX());
       // std::cout << "fitmin" << fitmin << std::endl;
@@ -167,12 +167,13 @@ void timewalkfit(){
 	 graph->SetMarkerStyle(7);*/
       // graph->Draw("AP");
     
-    /* std::ofstream fitpars;
+      std::ofstream fitpars;
       fitpars.open("fit_parameters.txt",std::ofstream::app);
       fitpars << col << "\t" << row << "\t"  << fitfuncTOA->GetParameter(2)
-       << setw(10) << fitfuncTOA->GetParameter(0) << setw(10) << fitfuncTOA->GetParameter(1) << std::endl;*/ //NO chi2/ndf for the time-being!
+	      << setw(10) << fitfuncTOA->GetParameter(0) << setw(10) << fitfuncTOA->GetParameter(1) << std::endl; //NO chi2/ndf for the time-being! Prints always 255 255 for col,row
       
     }
+  }
 
   TPfile->Close();
 }