Fix specific situation with link to self

interface/CBD/main.py

@@ -247,6 +247,8 @@ class InterfaceCore():
         if source and target:
             if self.mode not in ["Link", "InitialCondition"]:
                 print("Cannot create something not guaranteed to be link type!")
+            elif source == target:
+                print("Cannot create link to self")
             else:
                 global name
                 self.mv.instantiate_link(str(name), self.mode, source, target)