diff --git a/numass-main/src/main/groovy/inr/numass/scripts/Underflow.groovy b/numass-main/src/main/groovy/inr/numass/scripts/Underflow.groovy
index 1ed9dc7a..f57f4fc1 100644
--- a/numass-main/src/main/groovy/inr/numass/scripts/Underflow.groovy
+++ b/numass-main/src/main/groovy/inr/numass/scripts/Underflow.groovy
@@ -15,8 +15,8 @@ import inr.numass.utils.UnderflowCorrection
 
 //File dataDir = new File("D:\\Work\\Numass\\data\\2016_04\\T2_data\\Fill_2_2\\set_7_b2a3433e54010000")
 //File dataDir = new File("D:\\Work\\Numass\\data\\2016_04\\T2_data\\Fill_2_2\\set_6_e26d123e54010000")
-//File dataDir = new File("D:\\Work\\Numass\\data\\2016_10\\Fill_1\\set_28")
-File dataDir = new File("D:\\Work\\Numass\\data\\2016_10\\Adiabacity_19kV_4_dark\\set_1")
+File dataDir = new File("D:\\Work\\Numass\\data\\2016_10\\Fill_1\\set_28")
+//File dataDir = new File("D:\\Work\\Numass\\data\\2016_10\\Adiabacity_19kV_4_dark\\set_1")
 if(!dataDir.exists()){
     println "dataDir directory does not exist"
 }
diff --git a/numass-main/src/main/java/inr/numass/utils/UnderflowCorrection.java b/numass-main/src/main/java/inr/numass/utils/UnderflowCorrection.java
index 402c4027..76ab74a7 100644
--- a/numass-main/src/main/java/inr/numass/utils/UnderflowCorrection.java
+++ b/numass-main/src/main/java/inr/numass/utils/UnderflowCorrection.java
@@ -90,7 +90,7 @@ public class UnderflowCorrection {
                     .map(p -> new WeightedObservedPoint(
                             1d / p.getValue() * point.getLength() * point.getLength(), //weight
                             p.getKey(), // x
-                            p.getValue() / binning / point.getLength())//y
+                            p.getValue() / binning / point.getLength()) //y
                     )
                     .collect(Collectors.toList());
             SimpleCurveFitter fitter = SimpleCurveFitter.create(new ExponentFunction(), new double[]{1d, 200d});