diff --git a/dnet-pace-core/pom.xml b/dnet-pace-core/pom.xml
index 34138cc85..a34ed9f63 100644
--- a/dnet-pace-core/pom.xml
+++ b/dnet-pace-core/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>eu.dnetlib</groupId>
 		<artifactId>dnet-dedup</artifactId>
-		<version>3.0.15-SNAPSHOT</version>
+		<version>4.0.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
 	</parent>
 
diff --git a/dnet-pace-core/src/main/java/eu/dnetlib/pace/config/WfConfig.java b/dnet-pace-core/src/main/java/eu/dnetlib/pace/config/WfConfig.java
index bd00f2fb9..d2722ac53 100644
--- a/dnet-pace-core/src/main/java/eu/dnetlib/pace/config/WfConfig.java
+++ b/dnet-pace-core/src/main/java/eu/dnetlib/pace/config/WfConfig.java
@@ -256,9 +256,8 @@ public class WfConfig implements Serializable {
 		return maxIterations;
 	}
 
-	public WfConfig setMaxIterations(int maxIterations) {
+	public void setMaxIterations(int maxIterations) {
 		this.maxIterations = maxIterations;
-		return this;
 	}
 
 	/*
diff --git a/dnet-pace-core/src/main/java/eu/dnetlib/pace/tree/support/TreeProcessor.java b/dnet-pace-core/src/main/java/eu/dnetlib/pace/tree/support/TreeProcessor.java
index 50d3ec667..5663a79dd 100644
--- a/dnet-pace-core/src/main/java/eu/dnetlib/pace/tree/support/TreeProcessor.java
+++ b/dnet-pace-core/src/main/java/eu/dnetlib/pace/tree/support/TreeProcessor.java
@@ -24,16 +24,16 @@ public class TreeProcessor {
 	public boolean compare(final MapDocument a, final MapDocument b) {
 
 		//evaluate the decision tree
-		return evaluateTree(a, b, config.decisionTree()) == MatchType.MATCH;
+		return evaluateTree(a, b) == MatchType.MATCH;
 	}
 
-	public MatchType evaluateTree(final MapDocument doc1, final MapDocument doc2, final Map<String, TreeNodeDef> decisionTree){
+	public MatchType evaluateTree(final MapDocument doc1, final MapDocument doc2){
 
 		String current = "start";
 
 		while (MatchType.parse(current)==MatchType.UNDEFINED) {
 
-			TreeNodeDef currentNode = decisionTree.get(current);
+			TreeNodeDef currentNode = config.decisionTree().get(current);
 			//throw an exception if the node doesn't exist
 			if (currentNode == null)
 				throw new PaceException("The Tree Node doesn't exist: " + current);
@@ -57,4 +57,35 @@ public class TreeProcessor {
 		return MatchType.parse(current);
 	}
 
+	public double computeScore(final MapDocument doc1, final MapDocument doc2) {
+		String current = "start";
+		double score = 0.0;
+
+		while (MatchType.parse(current)==MatchType.UNDEFINED) {
+
+			TreeNodeDef currentNode = config.decisionTree().get(current);
+			//throw an exception if the node doesn't exist
+			if (currentNode == null)
+				throw new PaceException("The Tree Node doesn't exist: " + current);
+
+			TreeNodeStats stats = currentNode.evaluate(doc1, doc2, config);
+
+			score = stats.getFinalScore(currentNode.getAggregation());
+			//if ignoreUndefined=false the miss is considered as undefined
+			if (!currentNode.isIgnoreUndefined() && stats.getUndefinedCount()>0) {
+				current = currentNode.getUndefined();
+			}
+			//if ignoreUndefined=true the miss is ignored and the score computed anyway
+			else if (stats.getFinalScore(currentNode.getAggregation()) >= currentNode.getThreshold()) {
+				current = currentNode.getPositive();
+			}
+			else {
+				current = currentNode.getNegative();
+			}
+
+		}
+
+		return score;
+	}
+
 }