diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..14c62e5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+**/.settings
+**/.classpath
+**/.project
diff --git a/es.optsicom.lib.analysis/.gitignore b/es.optsicom.lib.analysis/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/es.optsicom.lib.analysis/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/es.optsicom.lib.analysis/pom.xml b/es.optsicom.lib.analysis/pom.xml
index e5813f7..7eb7488 100644
--- a/es.optsicom.lib.analysis/pom.xml
+++ b/es.optsicom.lib.analysis/pom.xml
@@ -2,7 +2,7 @@
 	<parent>
 		<artifactId>es.optsicom.lib.parent</artifactId>
 		<groupId>es.optsicom.lib</groupId>
-		<version>0.11.0-SNAPSHOT</version>
+		<version>0.13.0-SNAPSHOT</version>
 		<relativePath>../es.optsicom.lib.parent</relativePath>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
@@ -73,10 +73,12 @@
 		<dependency>
 			<groupId>org.eclipse.persistence</groupId>
 			<artifactId>eclipselink</artifactId>
+			<version>2.5.1</version>
 		</dependency>
 		<dependency>
 			<groupId>org.eclipse.persistence</groupId>
 			<artifactId>javax.persistence</artifactId>
+			<version>2.1.0</version>
 		</dependency>
 		<dependency>
 			<groupId>mysql</groupId>
@@ -119,9 +121,7 @@
 		<dependency>
 			<groupId>es.optsicom.lib</groupId>
 			<artifactId>es.optsicom.lib.util</artifactId>
-			<version>0.11.0-SNAPSHOT</version>
-			<type>jar</type>
-			<scope>compile</scope>
+			<version>0.13.0-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>junit</groupId>
diff --git a/es.optsicom.lib.approx/.gitignore b/es.optsicom.lib.approx/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/es.optsicom.lib.approx/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/es.optsicom.lib.approx/pom.xml b/es.optsicom.lib.approx/pom.xml
index bb70191..ea3ce62 100644
--- a/es.optsicom.lib.approx/pom.xml
+++ b/es.optsicom.lib.approx/pom.xml
@@ -2,7 +2,7 @@
 	<parent>
 		<artifactId>es.optsicom.lib.parent</artifactId>
 		<groupId>es.optsicom.lib</groupId>
-		<version>0.11.0-SNAPSHOT</version>
+		<version>0.13.0-SNAPSHOT</version>
 		<relativePath>../es.optsicom.lib.parent</relativePath>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
@@ -11,23 +11,15 @@
   <packaging>jar</packaging>
   
   <dependencies>
-  	<dependency>
-  		<groupId>org.eclipse.persistence</groupId>
-  		<artifactId>javax.persistence</artifactId>
-  	</dependency>
   	<dependency>
   		<groupId>es.optsicom.lib</groupId>
   		<artifactId>es.optsicom.lib.analysis</artifactId>
-  		<version>0.11.0-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>compile</scope>
+  		<version>0.13.0-SNAPSHOT</version>
   	</dependency>
   	<dependency>
   		<groupId>es.optsicom.lib</groupId>
   		<artifactId>es.optsicom.lib</artifactId>
-  		<version>0.11.0-SNAPSHOT</version>
-  		<type>jar</type>
-  		<scope>compile</scope>
+  		<version>0.13.0-SNAPSHOT</version>
   	</dependency>
   </dependencies>
 </project>
\ No newline at end of file
diff --git a/es.optsicom.lib.approx/src/main/java/es/optsicom/lib/approx/algorithm/mo/AbstractApproxMOMethod.java b/es.optsicom.lib.approx/src/main/java/es/optsicom/lib/approx/algorithm/mo/AbstractApproxMOMethod.java
index 3d94775..ffe6b9c 100644
--- a/es.optsicom.lib.approx/src/main/java/es/optsicom/lib/approx/algorithm/mo/AbstractApproxMOMethod.java
+++ b/es.optsicom.lib.approx/src/main/java/es/optsicom/lib/approx/algorithm/mo/AbstractApproxMOMethod.java
@@ -11,6 +11,7 @@
 package es.optsicom.lib.approx.algorithm.mo;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 import es.optsicom.lib.AbstractMethod;
@@ -79,4 +80,7 @@ public void newBestSolutionFound(es.optsicom.lib.approx.improvement.ImprovementM
 		this.setIfNonDominated(newBestSolution);
 	};
 	
+	public List<S> getBestSolutions() {
+		return Collections.unmodifiableList(bestSolutions);
+	}
 }
diff --git a/es.optsicom.lib.approx/src/main/java/es/optsicom/lib/approx/improvement/AbstractImprovementMethod.java b/es.optsicom.lib.approx/src/main/java/es/optsicom/lib/approx/improvement/AbstractImprovementMethod.java
index fa1c234..ca4b923 100644
--- a/es.optsicom.lib.approx/src/main/java/es/optsicom/lib/approx/improvement/AbstractImprovementMethod.java
+++ b/es.optsicom.lib.approx/src/main/java/es/optsicom/lib/approx/improvement/AbstractImprovementMethod.java
@@ -37,7 +37,10 @@ public boolean improveSolution(S solution) {
 	}
 
 	public final boolean improveSolution(S solution, long duration) {
-
+
+		double value = solution.getWeight();
+//		System.out.print("Value=" + value);
+		
 		lastImprovVisitedSolutions = 0;
 		
 		this.improveApplied = false;
@@ -50,6 +53,12 @@ public final boolean improveSolution(S solution, long duration) {
 		try {
 			this.improveApplied = internalImproveSolution(solution, duration);
 		} catch(TimeLimitException e){}
+		
+//		if(solution.getWeight() > value) {
+//			throw new Error("WTF, empeora....");
+//		}
+		
+//		System.out.println(" New value=" + solution.getWeight());
 		
 		return this.improveApplied;
 	}
diff --git a/es.optsicom.lib.exact/.gitignore b/es.optsicom.lib.exact/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/es.optsicom.lib.exact/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/es.optsicom.lib.exact/pom.xml b/es.optsicom.lib.exact/pom.xml
index 8ab0df5..ce83c68 100644
--- a/es.optsicom.lib.exact/pom.xml
+++ b/es.optsicom.lib.exact/pom.xml
@@ -3,7 +3,7 @@
 	<parent>
 		<artifactId>es.optsicom.lib.parent</artifactId>
 		<groupId>es.optsicom.lib</groupId>
-		<version>0.10.1-SNAPSHOT</version>
+		<version>0.13.0-SNAPSHOT</version>
 		<relativePath>../es.optsicom.lib.parent</relativePath>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
@@ -14,16 +14,12 @@
 		<dependency>
 			<groupId>es.optsicom.lib</groupId>
 			<artifactId>es.optsicom.lib</artifactId>
-			<version>0.10.1-SNAPSHOT</version>
-			<type>jar</type>
-			<scope>compile</scope>
+			<version>0.13.0-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>es.optsicom.lib</groupId>
 			<artifactId>es.optsicom.lib.analysis</artifactId>
-			<version>0.10.1-SNAPSHOT</version>
-			<type>jar</type>
-			<scope>compile</scope>
+			<version>0.13.0-SNAPSHOT</version>
 		</dependency>
 <!-- 		<dependency> -->
 <!-- 			<groupId>com.cplex</groupId> -->
@@ -38,18 +34,14 @@
 		<dependency>
 			<groupId>es.optsicom.lib</groupId>
 			<artifactId>es.optsicom.lib.util</artifactId>
-			<version>0.10.1-SNAPSHOT</version>
-			<type>jar</type>
-			<scope>compile</scope>
+			<version>0.13.0-SNAPSHOT</version>
 		</dependency>
 		<!-- This dependency comes from CplexFormulation, which contains an attribute 
 			of type ApproxMethod -->
 		<dependency>
 			<groupId>es.optsicom.lib</groupId>
 			<artifactId>es.optsicom.lib.approx</artifactId>
-			<version>0.10.1-SNAPSHOT</version>
-			<type>jar</type>
-			<scope>compile</scope>
+			<version>0.13.0-SNAPSHOT</version>
 		</dependency>
 	</dependencies>
 </project>
\ No newline at end of file
diff --git a/es.optsicom.lib.parent/pom.xml b/es.optsicom.lib.parent/pom.xml
index 0b5da62..a92ad1b 100644
--- a/es.optsicom.lib.parent/pom.xml
+++ b/es.optsicom.lib.parent/pom.xml
@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>es.optsicom.lib</groupId>
 	<artifactId>es.optsicom.lib.parent</artifactId>
-	<version>0.12.0-SNAPSHOT</version>
+	<version>0.13.0-SNAPSHOT</version>
 	<packaging>pom</packaging>
 
 	<modules>
@@ -33,18 +33,18 @@
 		<url>www.optsicom.es</url>
 	</organization>
 
-	<distributionManagement>
-		<repository>
-			<id>releases</id>
-			<name>Sidelab Releases</name>
-			<url>http://build.sidelab.es:8080/archiva/repository/releases/</url>
-		</repository>
-		<snapshotRepository>
-			<id>snapshots</id>
-			<name>Sidelab Snapshots</name>
-			<url>http://build.sidelab.es:8080/archiva/repository/snapshots/</url>
-		</snapshotRepository>
-	</distributionManagement>
+<!-- 	<distributionManagement> -->
+<!-- 		<repository> -->
+<!-- 			<id>releases</id> -->
+<!-- 			<name>Sidelab Releases</name> -->
+<!-- 			<url>http://build.sidelab.es:8080/archiva/repository/releases/</url> -->
+<!-- 		</repository> -->
+<!-- 		<snapshotRepository> -->
+<!-- 			<id>snapshots</id> -->
+<!-- 			<name>Sidelab Snapshots</name> -->
+<!-- 			<url>http://build.sidelab.es:8080/archiva/repository/snapshots/</url> -->
+<!-- 		</snapshotRepository> -->
+<!-- 	</distributionManagement> -->
 
 	<repositories>
 		<repository>
@@ -59,16 +59,6 @@
 
 	<dependencyManagement>
 		<dependencies>
-			<dependency>
-				<groupId>org.eclipse.persistence</groupId>
-				<artifactId>javax.persistence</artifactId>
-				<version>2.0.3</version>
-			</dependency>
-			<dependency>
-				<groupId>org.eclipse.persistence</groupId>
-				<artifactId>eclipselink</artifactId>
-				<version>2.1.0</version>
-			</dependency>
 			<dependency>
 				<groupId>junit</groupId>
 				<artifactId>junit</artifactId>
diff --git a/es.optsicom.lib.util/.gitignore b/es.optsicom.lib.util/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/es.optsicom.lib.util/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/es.optsicom.lib.util/pom.xml b/es.optsicom.lib.util/pom.xml
index 3e59b78..e8f32ad 100644
--- a/es.optsicom.lib.util/pom.xml
+++ b/es.optsicom.lib.util/pom.xml
@@ -2,7 +2,7 @@
 	<parent>
 		<artifactId>es.optsicom.lib.parent</artifactId>
 		<groupId>es.optsicom.lib</groupId>
-		<version>0.11.0-SNAPSHOT</version>
+		<version>0.13.0-SNAPSHOT</version>
 		<relativePath>../es.optsicom.lib.parent</relativePath>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
diff --git a/es.optsicom.lib/.gitignore b/es.optsicom.lib/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/es.optsicom.lib/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/es.optsicom.lib/pom.xml b/es.optsicom.lib/pom.xml
index a9db22c..39e7511 100644
--- a/es.optsicom.lib/pom.xml
+++ b/es.optsicom.lib/pom.xml
@@ -3,7 +3,7 @@
 	<parent>
 		<artifactId>es.optsicom.lib.parent</artifactId>
 		<groupId>es.optsicom.lib</groupId>
-		<version>0.11.0-SNAPSHOT</version>
+		<version>0.13.0-SNAPSHOT</version>
 		<relativePath>../es.optsicom.lib.parent</relativePath>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>
@@ -14,9 +14,7 @@
 		<dependency>
 			<groupId>es.optsicom.lib</groupId>
 			<artifactId>es.optsicom.lib.analysis</artifactId>
-			<version>0.11.0-SNAPSHOT</version>
-			<type>jar</type>
-			<scope>compile</scope>
+			<version>0.13.0-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>com.google.guava</groupId>
diff --git a/es.optsicom.lib/src/main/java/es/optsicom/lib/multiobjective/MOAbstractMethod.java b/es.optsicom.lib/src/main/java/es/optsicom/lib/multiobjective/MOAbstractMethod.java
index dd4af87..75de7b7 100644
--- a/es.optsicom.lib/src/main/java/es/optsicom/lib/multiobjective/MOAbstractMethod.java
+++ b/es.optsicom.lib/src/main/java/es/optsicom/lib/multiobjective/MOAbstractMethod.java
@@ -1,14 +1,12 @@
 package es.optsicom.lib.multiobjective;
 
-import es.optsicom.lib.AbstractMethod;
 import es.optsicom.lib.Instance;
-import es.optsicom.lib.Solution;
 import es.optsicom.lib.SolutionFactory;
 import es.optsicom.lib.util.Id;
 import es.optsicom.lib.util.description.DescriptiveHelper;
 import es.optsicom.lib.util.description.Properties;
 
-public abstract class MOAbstractMethod<S extends MultiObjectiveSolution, I extends Instance> implements MultiObjectiveMethod<S, I> {
+public abstract class MOAbstractMethod<S extends MultiObjectiveSolution<I>, I extends Instance> implements MultiObjectiveMethod<S, I> {
 
 	protected SolutionFactory<S, I> factory;
 	
diff --git a/es.optsicom.lib/src/main/java/es/optsicom/lib/multiobjective/MultiObjectiveMethod.java b/es.optsicom.lib/src/main/java/es/optsicom/lib/multiobjective/MultiObjectiveMethod.java
index e2ef2d7..285b5e4 100644
--- a/es.optsicom.lib/src/main/java/es/optsicom/lib/multiobjective/MultiObjectiveMethod.java
+++ b/es.optsicom.lib/src/main/java/es/optsicom/lib/multiobjective/MultiObjectiveMethod.java
@@ -2,12 +2,10 @@
 
 import es.optsicom.lib.Instance;
 import es.optsicom.lib.Method;
-import es.optsicom.lib.Solution;
-import es.optsicom.lib.experiment.ExecutionResult;
 import es.optsicom.lib.multiobjective.experiment.MOExecutionResult;
 
 
-public interface MultiObjectiveMethod<S extends MultiObjectiveSolution, I extends Instance> extends Method<S, I> {
+public interface MultiObjectiveMethod<S extends MultiObjectiveSolution<I>, I extends Instance> extends Method<S, I> {
 
 	public boolean isMultiObjective();
 	
diff --git a/es.optsicom.lib/src/main/java/es/optsicom/lib/multiobjective/MultiObjectiveSolution.java b/es.optsicom.lib/src/main/java/es/optsicom/lib/multiobjective/MultiObjectiveSolution.java
index 139ebf3..49be785 100644
--- a/es.optsicom.lib/src/main/java/es/optsicom/lib/multiobjective/MultiObjectiveSolution.java
+++ b/es.optsicom.lib/src/main/java/es/optsicom/lib/multiobjective/MultiObjectiveSolution.java
@@ -1,12 +1,5 @@
 package es.optsicom.lib.multiobjective;
 
-import java.util.ArrayList;
-import java.util.List;
-
-import com.google.common.base.Function;
-
-import es.optsicom.lib.Instance;
-import es.optsicom.lib.Solution;
 import es.optsicom.lib.util.BestMode;
 
 public interface MultiObjectiveSolution {