diff --git a/src/eva2/server/go/operators/mutation/MutateEAMixer.java b/src/eva2/server/go/operators/mutation/MutateEAMixer.java
index 351e94f6..439310ef 100644
--- a/src/eva2/server/go/operators/mutation/MutateEAMixer.java
+++ b/src/eva2/server/go/operators/mutation/MutateEAMixer.java
@@ -39,7 +39,7 @@ public class MutateEAMixer implements InterfaceMutation, java.io.Serializable  {
                 System.out.println("Illegal access exception for " +(String)mutators.get(i) );
             }
         }
-        this.m_Mutators = new PropertyMutationMixer(tmpList);
+        this.m_Mutators = new PropertyMutationMixer(tmpList, false);
         tmpList = new InterfaceMutation[2];
         tmpList[0] = new MutateGINominal();
         tmpList[1] = new MutateGIOrdinal();
@@ -55,7 +55,7 @@ public class MutateEAMixer implements InterfaceMutation, java.io.Serializable  {
      * @param mutators
      */
     public MutateEAMixer(InterfaceMutation ... mutators) {
-        this.m_Mutators         = new PropertyMutationMixer(mutators);
+        this.m_Mutators         = new PropertyMutationMixer(mutators, true);
         this.m_UseSelfAdaption  = false;
     }
     
diff --git a/src/eva2/server/go/operators/mutation/PropertyMutationMixer.java b/src/eva2/server/go/operators/mutation/PropertyMutationMixer.java
index a91fb05f..f9a25927 100644
--- a/src/eva2/server/go/operators/mutation/PropertyMutationMixer.java
+++ b/src/eva2/server/go/operators/mutation/PropertyMutationMixer.java
@@ -16,11 +16,12 @@ public class PropertyMutationMixer implements java.io.Serializable {
     public String                           m_WeightsLabel          = "-";
     public boolean                          m_NormalizationEnabled  = true;
 
-    public PropertyMutationMixer(InterfaceMutation[] d) {
+    public PropertyMutationMixer(InterfaceMutation[] d, boolean selectAllOrNone) {
         this.m_Weights = new double[d.length];
         for (int i = 0; i < d.length; i++) this.m_Weights[i] = 1/((double)d.length);
         this.m_AvailableTargets = d;
-        this.m_SelectedTargets  = null;
+        if (selectAllOrNone) this.m_SelectedTargets  = d.clone();
+        else this.m_SelectedTargets = null;
     }
     public PropertyMutationMixer(PropertyMutationMixer d) {
         this.m_DescriptiveString        = d.m_DescriptiveString;
diff --git a/src/eva2/server/go/populations/Population.java b/src/eva2/server/go/populations/Population.java
index b5b9205d..0c0221a1 100644
--- a/src/eva2/server/go/populations/Population.java
+++ b/src/eva2/server/go/populations/Population.java
@@ -1725,10 +1725,15 @@ public class Population extends ArrayList implements PopulationInterface, Clonea
     	
         for (int i = 0; i < pop.size(); i++) {
         	for (int j = i+1; j < pop.size(); j++) {
-        		if (metric == null) d = EuclideanMetric.euclideanDistance(AbstractEAIndividual.getDoublePositionShallow(pop.get(i)), 
-                		AbstractEAIndividual.getDoublePositionShallow(pop.get(j)));
-        		else d = metric.distance((AbstractEAIndividual)pop.get(i), (AbstractEAIndividual)pop.get(j));
-                distSum += d;
+        		try {
+        			if (metric == null) d = EuclideanMetric.euclideanDistance(AbstractEAIndividual.getDoublePositionShallow(pop.get(i)), 
+        					AbstractEAIndividual.getDoublePositionShallow(pop.get(j)));
+        			else d = metric.distance((AbstractEAIndividual)pop.get(i), (AbstractEAIndividual)pop.get(j));
+        		} catch (Exception e) {
+        			EVAERROR.errorMsgOnce("Exception when calculating population measures ... possibly no double position available?");
+        			d = 0;
+        		}
+        		distSum += d;
                 if (d < minDist) minDist = d;
                 if (d > maxDist) maxDist = d;
             }