diff --git a/esds/simulator.py b/esds/simulator.py
index f2358fc..fee9331 100644
--- a/esds/simulator.py
+++ b/esds/simulator.py
@@ -76,12 +76,10 @@ class Simulator:
         """
         Log all the informations for debugging
         """
-        stdout_save = sys.stdout
         with open(self.debug_file_path, "a") as debug_file:
-            sys.stdout = debug_file 
-            print("-----------------------------------------------")
-            print("Started since {}s".format(round(time.time()-self.startat,2)))
-            print("Simulated time {}s (or more precisely {}s)".format(self.time_truncated,self.time))
+            debug_file.write("-----------------------------------------------\n")
+            debug_file.write("Started since {}s\n".format(round(time.time()-self.startat,2)))
+            debug_file.write("Simulated time {}s (or more precisely {}s)\n".format(self.time_truncated,self.time))
             states=dict()
             timeout_mode=list()
             sharing=dict()
@@ -94,18 +92,17 @@ class Simulator:
                         if node_key not in sharing:
                             sharing[node_key] = ""
                         sharing[node_key]+=str(int(self.sharing[interface][node.node_id]))
-            print("Node number per state: ",end="")
+            debug_file.write("Node number per state: ")
             for key in states:
-                print(key+"="+str(states[key]), end=" ")
-            print("\nNode sharing: ",end="")
+                debug_file.write(key+"="+str(states[key]))
+            debug_file.write("\nNode sharing: ")
             for node_id in sharing:
-                print(node_id+"="+sharing[node_id], end=" ")
-            print("\nIds of node in timeout mode: ", end="")
+                debug_file.write(node_id+"="+sharing[node_id])
+            debug_file.write("\nIds of node in timeout mode: ")
             for n in timeout_mode:
-                print(n,end=" ")
-            print("\nSorted events list:")
-            print(self.events)
-            sys.stdout = stdout_save
+                debug_file.write(n)
+            debug_file.write("\nSorted events list:\n")
+            debug_file.write(np.array_str(self.events)+"\n")
           
     def create_node(self, src, args=None):
         """