diff --git a/src/main/java/eva2/problems/ExternalRuntimeProblem.java b/src/main/java/eva2/problems/ExternalRuntimeProblem.java
index d834d47e..7253c519 100644
--- a/src/main/java/eva2/problems/ExternalRuntimeProblem.java
+++ b/src/main/java/eva2/problems/ExternalRuntimeProblem.java
@@ -363,6 +363,10 @@ public class ExternalRuntimeProblem extends AbstractOptimizationProblem
         this.initializationRange.adaptRowCount(t);
     }
 
+    public int getProblemDimension() {
+        return this.problemDimension;
+    }
+
     /**
      * Length of the x vector at is to be optimized
      *