diff --git a/autosubmit/job/job_utils.py b/autosubmit/job/job_utils.py
index b73e21fbad52dcbc459083b62a4604ea113c7fd0..f0281dabf6d87a3df4237dddc88dd9d70b41a292 100644
--- a/autosubmit/job/job_utils.py
+++ b/autosubmit/job/job_utils.py
@@ -29,17 +29,17 @@ def transitive_reduction(graph):
     try:
         return networkx.algorithms.dag.transitive_reduction(graph)
     except Exception as exp:
-        return None
-    # if not is_directed_acyclic_graph(graph):
-    #     raise NetworkXError("Transitive reduction only uniquely defined on directed acyclic graphs.")
-    # reduced_graph = DiGraph()
-    # reduced_graph.add_nodes_from(graph.nodes())
-    # for u in graph:
-    #     u_edges = set(graph[u])
-    #     for v in graph[u]:
-    #         u_edges -= {y for x, y in dfs_edges(graph, v)}
-    #     reduced_graph.add_edges_from((u, v) for v in u_edges)
-    # return reduced_graph
+        if not is_directed_acyclic_graph(graph):
+            raise NetworkXError(
+                "Transitive reduction only uniquely defined on directed acyclic graphs.")
+        reduced_graph = DiGraph()
+        reduced_graph.add_nodes_from(graph.nodes())
+        for u in graph:
+            u_edges = set(graph[u])
+            for v in graph[u]:
+                u_edges -= {y for x, y in dfs_edges(graph, v)}
+            reduced_graph.add_edges_from((u, v) for v in u_edges)
+        return reduced_graph
 
 
 class Dependency(object):
@@ -63,4 +63,3 @@ class Dependency(object):
                 self.select_chunks_orig.append(chunk_relation[1])
             else:
                 self.select_chunks_orig.append([])
-