diff --git a/esds/simulator.py b/esds/simulator.py
index fcc759b..b3bbfc2 100644
--- a/esds/simulator.py
+++ b/esds/simulator.py
@@ -424,7 +424,7 @@ class Simulator:
                             if dst["state"] == "call_blocking" and dst["request"] == "receive":
                                 dst["interfaces_queue_size"][interface]-=1
                                 dst["state"]="running"
-                                dst.rqueue.put(("receive",RCode.SUCCESS))
+                                dst.rqueue.put(("receive",rcode))
                                 self.sync_node_non_blocking(dst,timeout_remove_only=True)
                             self.notify_node_plugins(dst, "on_communication_end", event)
                         self.update_sharing(dst.node_id,-1,interface)
diff --git a/manual/manual.pdf b/manual/manual.pdf
index 99bdd02..e17cdb5 100644
Binary files a/manual/manual.pdf and b/manual/manual.pdf differ
diff --git a/manual/manual.tex b/manual/manual.tex
index e5e6db8..3cc68f5 100644
--- a/manual/manual.tex
+++ b/manual/manual.tex
@@ -180,6 +180,9 @@ breakpoints_callback:
   \label{keywords:general}
 \end{table}
 
+\subsubsection{Notes}
+The \textbf{interferences} keywords allows to control interference detection. It works as follow. If at any point in time during a wireless communication, another communication happens, on the same wireless interface, in the range of the receiver, then the interference return code will be given to the receiver upon reception.
+
 \subsection{The node section}
 The node section is used configure the simulated node of esds. Table \ref{keywords:nodes} references
 all the keywords used in the nodes section.