diff --git a/reconstruction/cvt/src/main/java/org/jlab/rec/cvt/ml/CVTFilter.java b/reconstruction/cvt/src/main/java/org/jlab/rec/cvt/ml/CVTFilter.java
index 8e18ec2a59..f7068085e3 100644
--- a/reconstruction/cvt/src/main/java/org/jlab/rec/cvt/ml/CVTFilter.java
+++ b/reconstruction/cvt/src/main/java/org/jlab/rec/cvt/ml/CVTFilter.java
@@ -30,6 +30,8 @@
  */
 public class CVTFilter extends ReconstructionEngine {
 
+    @Override
+    public void detectorChanged(int run) {}
 
     /**
      * @param docacutsum the docacutsum to set
@@ -38,8 +40,6 @@ public void setDocacutsum(double docacutsum) {
         this.docacutsum = docacutsum;
     }
 
-    private int Run = -1;
-
     private String svtHitBank;
     private String svtClusterBank;
     private String svtCrossBank;
@@ -277,7 +277,7 @@ public void setBmtzmaxclussize(int bmtzmaxclussize) {
     }
     
     @Override
-    public boolean processDataEvent(DataEvent event) {
+    public boolean processDataEventUser(DataEvent event) {
         
         Swim swimmer = new Swim();
         
@@ -463,7 +463,6 @@ public void loadConfiguration() {
         
     }
 
-
     public void initConstantsTables() {
         String[] tables = new String[]{
             "/calibration/svt/status",
@@ -583,7 +582,6 @@ public String getCovMat() {
         return cvtCovMatBank;
     }
     
-    
     public void printConfiguration() {            
         
         System.out.println("["+this.getName()+"] run with cosmics setting set to "+Constants.getInstance().isCosmics);        
@@ -613,10 +611,6 @@ public void printConfiguration() {
         System.out.println("["+this.getName()+"] max btm-z  cluster size "+this.getBmtzmaxclussize());
         System.out.println("["+this.getName()+"] helix radius cut (mm) "+this.rcut);
         System.out.println("["+this.getName()+"] z0 cut (mm from target edges) "+this.z0cut); 
-        
-        
     }
 
-    
-
 }
diff --git a/reconstruction/cvt/src/main/java/org/jlab/rec/cvt/ml/SampleMaker.java b/reconstruction/cvt/src/main/java/org/jlab/rec/cvt/ml/SampleMaker.java
index a600b58e67..391c0392e7 100644
--- a/reconstruction/cvt/src/main/java/org/jlab/rec/cvt/ml/SampleMaker.java
+++ b/reconstruction/cvt/src/main/java/org/jlab/rec/cvt/ml/SampleMaker.java
@@ -29,7 +29,9 @@
  */
 public class SampleMaker extends ReconstructionEngine {
 
-
+    @Override
+    public void detectorChanged(int run) {}
+    
     /**
      * @param docacutsum the docacutsum to set
      */
@@ -101,7 +103,6 @@ public SampleMaker() {
         super("CVTEngine", "ziegler", "6.0");
     }
 
-    
     @Override
     public boolean init() {        
         this.loadConfiguration();
@@ -285,7 +286,7 @@ public void setBmtzmaxclussize(int bmtzmaxclussize) {
     }
     
     @Override
-    public boolean processDataEvent(DataEvent event) {
+    public boolean processDataEventUser(DataEvent event) {
         
         Swim swimmer = new Swim();
         
@@ -693,6 +694,4 @@ public void printConfiguration() {
         
     }
 
-    
-
 }
diff --git a/reconstruction/cvt/src/main/java/org/jlab/rec/cvt/ml/qcddat/SampleMaker.java b/reconstruction/cvt/src/main/java/org/jlab/rec/cvt/ml/qcddat/SampleMaker.java
index 588473489b..11179b2af2 100644
--- a/reconstruction/cvt/src/main/java/org/jlab/rec/cvt/ml/qcddat/SampleMaker.java
+++ b/reconstruction/cvt/src/main/java/org/jlab/rec/cvt/ml/qcddat/SampleMaker.java
@@ -29,9 +29,6 @@
  */
 public class SampleMaker extends ReconstructionEngine {
 
-
-    private int Run = -1;
-
     private String svtHitBank;
     
     public SampleMaker(String name) {
@@ -42,7 +39,9 @@ public SampleMaker() {
         super("CVTQCDDATEngine", "ziegler", "6.0");
     }
 
-    
+    @Override
+    public void detectorChanged(int run) {}
+
     @Override
     public boolean init() {   
         this.initConstantsTables();
@@ -70,10 +69,8 @@ public int getRun(DataEvent event) {
         return run;
     }
 
-    
-    
     @Override
-    public boolean processDataEvent(DataEvent event) {
+    public boolean processDataEventUser(DataEvent event) {
        
         int run = this.getRun(event); 
         Swim swimmer = new Swim();
@@ -195,8 +192,4 @@ public void setSvtHitBank(String bstHitBank) {
     public String getSvtHitBank() {
         return this.svtHitBank;
     }
-    
-    
-    
-
 }