diff --git a/jmetal-core/src/main/java/org/uma/jmetal/util/solutionattribute/impl/GenericSolutionAttribute.java b/jmetal-core/src/main/java/org/uma/jmetal/util/solutionattribute/impl/GenericSolutionAttribute.java
index <HASH>..<HASH> 100755
--- a/jmetal-core/src/main/java/org/uma/jmetal/util/solutionattribute/impl/GenericSolutionAttribute.java
+++ b/jmetal-core/src/main/java/org/uma/jmetal/util/solutionattribute/impl/GenericSolutionAttribute.java
@@ -35,7 +35,7 @@ public class GenericSolutionAttribute <S extends Solution<?>, V> implements Solu
   }

 

   @Override

-  public static Object getAttributeID() {

+  public Object getAttributeID() {

     return this.getClass() ;

   }

 }
undo changes in GenericSolutionAttribute