diff --git a/OSMDatastructure/OsmNode.cs b/OSMDatastructure/OsmNode.cs
index e808014..f77d7ee 100644
--- a/OSMDatastructure/OsmNode.cs
+++ b/OSMDatastructure/OsmNode.cs
@@ -41,9 +41,15 @@ public class OsmNode
 
     public override string ToString()
     {
-        return string.Format(
-            "NODE {0} Edges-Count: {1} previousPathNode: {2} currentPathWeight: {3} directDistanceToGoal: {4}",
-            this.coordinates.ToString(), this.edges.Count, this.previousPathNode.coordinates.ToString(),
-            this.currentPathWeight, this.directDistanceToGoal);
+        if(this.previousPathNode != null)
+            return string.Format(
+                "NODE {0} Edges-Count: {1} previousPathNode: {2} currentPathWeight: {3} directDistanceToGoal: {4}",
+                this.coordinates.ToString(), this.edges.Count, this.previousPathNode.coordinates.ToString(),
+                this.currentPathWeight, this.directDistanceToGoal);
+        else
+            return string.Format(
+                "NODE {0} Edges-Count: {1} previousPathNode: NO PREVIOUS NODE currentPathWeight: {2}  directDistanceToGoal: {3}",
+                this.coordinates.ToString(), this.edges.Count, 
+                this.currentPathWeight, this.directDistanceToGoal);
     }
 }
\ No newline at end of file