diff --git a/bin/qtl-analysis b/bin/qtl-analysis
index df161b5f..e70b4a67 100755
--- a/bin/qtl-analysis
+++ b/bin/qtl-analysis
@@ -140,6 +140,10 @@ if ${modes['help']}; then
   exit 101
 fi
 
+######################
+singleTimeline=cvt_efficiency
+######################
+
 ##################################################################################
 
 # main executable for detector timelines
diff --git a/src/main/java/org/jlab/clas/timeline/run_histograms.java b/src/main/java/org/jlab/clas/timeline/run_histograms.java
index d64bab1c..964255dd 100644
--- a/src/main/java/org/jlab/clas/timeline/run_histograms.java
+++ b/src/main/java/org/jlab/clas/timeline/run_histograms.java
@@ -35,19 +35,19 @@ public static void main(String[] args) {
     var dataset = RunDependentCut.findDataset(runNum);
 
     //// instantiate histogramming classes
-    GeneralMon ana_mon      = new GeneralMon(runNum,outputDir,EB,useTB);
-    DCandFTOF  ana_dc_ftof  = new DCandFTOF(runNum,outputDir,useTB);
-    CTOF       ana_ctof     = new CTOF(runNum,outputDir,useTB);
-    HTCC       ana_htcc     = new HTCC(runNum,outputDir);
-    LTCC       ana_ltcc     = new LTCC(runNum,outputDir,EB,useTB);
-    RICH       ana_rich     = new RICH(runNum,outputDir,EB,useTB);
-    CND        ana_cnd      = new CND(runNum,outputDir,useTB);
+    // GeneralMon ana_mon      = new GeneralMon(runNum,outputDir,EB,useTB);
+    // DCandFTOF  ana_dc_ftof  = new DCandFTOF(runNum,outputDir,useTB);
+    // CTOF       ana_ctof     = new CTOF(runNum,outputDir,useTB);
+    // HTCC       ana_htcc     = new HTCC(runNum,outputDir);
+    // LTCC       ana_ltcc     = new LTCC(runNum,outputDir,EB,useTB);
+    // RICH       ana_rich     = new RICH(runNum,outputDir,EB,useTB);
+    // CND        ana_cnd      = new CND(runNum,outputDir,useTB);
     CVT        ana_cvt      = dataset != "rgl" ? new CVT() : null;
-    FT         ana_ft       = new FT(runNum,outputDir,useTB);
-    BAND       ana_band     = new BAND(runNum,outputDir,EB,useTB);
-    ALERT      ana_alert    = dataset == "rgl" ? new ALERT(runNum,outputDir,EB,useTB) : null;
-    helicity   ana_helicity = new helicity();
-    trigger    ana_trigger  = new trigger();
+    // FT         ana_ft       = new FT(runNum,outputDir,useTB);
+    // BAND       ana_band     = new BAND(runNum,outputDir,EB,useTB);
+    // ALERT      ana_alert    = dataset == "rgl" ? new ALERT(runNum,outputDir,EB,useTB) : null;
+    // helicity   ana_helicity = new helicity();
+    // trigger    ana_trigger  = new trigger();
 
     List<String> toProcessFileNames = new ArrayList<String>();
     File file = new File(filelist);
@@ -90,19 +90,19 @@ public static void main(String[] args) {
         DataEvent event = reader.getNextEvent();
 
         //// call each histogramming class instance's `processEvent`
-        if(ana_mon!=null) ana_mon.processEvent(event);
-        if(ana_ctof!=null) ana_ctof.processEvent(event);
-        if(ana_dc_ftof!=null) ana_dc_ftof.processEvent(event);
-        if(ana_htcc!=null) ana_htcc.processEvent(event);
-        if(ana_ltcc!=null) ana_ltcc.processEvent(event);
-        if(ana_cnd!=null) ana_cnd.processEvent(event);
+        // if(ana_mon!=null) ana_mon.processEvent(event);
+        // if(ana_ctof!=null) ana_ctof.processEvent(event);
+        // if(ana_dc_ftof!=null) ana_dc_ftof.processEvent(event);
+        // if(ana_htcc!=null) ana_htcc.processEvent(event);
+        // if(ana_ltcc!=null) ana_ltcc.processEvent(event);
+        // if(ana_cnd!=null) ana_cnd.processEvent(event);
         if(ana_cvt!=null) ana_cvt.processEvent(event);
-        if(ana_ft!=null) ana_ft.processEvent(event);
-        if(ana_band!=null) ana_band.processEvent(event);
-        if(ana_alert!=null) ana_alert.processEvent(event);
-        if(ana_rich!=null) ana_rich.processEvent(event);
-        if(ana_helicity!=null) ana_helicity.processEvent(event);
-        if(ana_trigger!=null) ana_trigger.processEvent(event);
+        // if(ana_ft!=null) ana_ft.processEvent(event);
+        // if(ana_band!=null) ana_band.processEvent(event);
+        // if(ana_alert!=null) ana_alert.processEvent(event);
+        // if(ana_rich!=null) ana_rich.processEvent(event);
+        // if(ana_helicity!=null) ana_helicity.processEvent(event);
+        // if(ana_trigger!=null) ana_trigger.processEvent(event);
 
         count++;
         if(count%10000 == 0){
@@ -121,19 +121,19 @@ public static void main(String[] args) {
     System.out.println("Total : " + count + " events");
 
     //// call each histogramming class instance's `write`
-    if(ana_mon!=null) ana_mon.write();
-    if(ana_ctof!=null) ana_ctof.write();
-    if(ana_dc_ftof!=null) ana_dc_ftof.write();
-    if(ana_htcc!=null) ana_htcc.write();
-    if(ana_ltcc!=null) ana_ltcc.write();
-    if(ana_cnd!=null) ana_cnd.write();
+    // if(ana_mon!=null) ana_mon.write();
+    // if(ana_ctof!=null) ana_ctof.write();
+    // if(ana_dc_ftof!=null) ana_dc_ftof.write();
+    // if(ana_htcc!=null) ana_htcc.write();
+    // if(ana_ltcc!=null) ana_ltcc.write();
+    // if(ana_cnd!=null) ana_cnd.write();
     if(ana_cvt!=null) ana_cvt.write(outputDir, runNum);
-    if(ana_ft!=null) ana_ft.write();
-    if(ana_band!=null) ana_band.write();
-    if(ana_alert!=null) ana_alert.write();
-    if(ana_rich!=null) ana_rich.write();
-    if(ana_helicity!=null) ana_helicity.write(outputDir, runNum);
-    if(ana_trigger!=null) ana_trigger.write(outputDir, runNum);
+    // if(ana_ft!=null) ana_ft.write();
+    // if(ana_band!=null) ana_band.write();
+    // if(ana_alert!=null) ana_alert.write();
+    // if(ana_rich!=null) ana_rich.write();
+    // if(ana_helicity!=null) ana_helicity.write(outputDir, runNum);
+    // if(ana_trigger!=null) ana_trigger.write(outputDir, runNum);
 
   }
 }