diff --git a/esds/simulator.py b/esds/simulator.py
index 30534de..cdc85d3 100644
--- a/esds/simulator.py
+++ b/esds/simulator.py
@@ -331,6 +331,9 @@ class Simulator:
             if interface not in self.nodes[dst]["interfaces"]:
                 self.log("Cannot create communication from node "+str(src)+ " to "+str(dst)+", interface "+interface+" not available on node "+str(dst))
                 exit(1)
+            elif src==dst:
+                self.log("Cannot create communication from node "+str(src)+ " to "+str(dst)+" on interface "+interface+", receiver node cannot be the sender")
+                exit(1)
             self.log("Send "+str(datasize)+" bytes to n"+str(dst)+" on "+interface,node=nsrc)
             if not self.nodes[dst]["turned_on"] and receiver_required:
                 return(False)