diff --git a/daemon/ns3/corens3/obj.py b/daemon/ns3/corens3/obj.py
index c106aa9f..0d392a4b 100644
--- a/daemon/ns3/corens3/obj.py
+++ b/daemon/ns3/corens3/obj.py
@@ -360,11 +360,11 @@ class Ns3Session(Session):
     A Session that starts an ns-3 simulation thread.
     """
 
-    def __init__(self, persistent=False, duration=600):
+    def __init__(self, session_id, persistent=False, duration=600):
         self.duration = duration
         self.nodes = ns.network.NodeContainer()
         self.mobhelper = ns.mobility.MobilityHelper()
-        Session.__init__(self, persistent=persistent)
+        Session.__init__(self, session_id, persistent=persistent)
 
     def run(self, vis=False):
         """
@@ -478,7 +478,7 @@ class Ns3Session(Session):
                     continue
                 # from WayPointMobility.setnodeposition(node, x, y, z)
                 node.position.set(x, y, z)
-                node_data = node.data(flags=0)
+                node_data = node.data(0)
                 self.broadcast_node(node_data)
                 self.sdt.updatenode(node.objid, flags=0, x=x, y=y, z=z)
             time.sleep(0.001 * refresh_ms)
diff --git a/daemon/ns3/examples/ns3lte.py b/daemon/ns3/examples/ns3lte.py
index 58471a89..de9cef98 100755
--- a/daemon/ns3/examples/ns3lte.py
+++ b/daemon/ns3/examples/ns3lte.py
@@ -12,6 +12,8 @@ import ns.mobility
 
 from core import logger
 from core.misc import ipaddress
+from core.misc import nodemaps
+from core.misc import nodeutils
 from corens3.obj import Ns3LteNet
 from corens3.obj import Ns3Session
 
@@ -20,7 +22,8 @@ def ltesession(opt):
     """
     Run a test LTE session.
     """
-    session = Ns3Session(persistent=True, duration=opt.duration)
+    nodeutils.set_node_map(nodemaps.NODES)
+    session = Ns3Session(1, persistent=True, duration=opt.duration)
     lte = session.add_object(cls=Ns3LteNet, name="wlan1")
     lte.setsubchannels(range(25), range(50, 100))
     if opt.verbose:
diff --git a/daemon/ns3/examples/ns3wifi.py b/daemon/ns3/examples/ns3wifi.py
index bc29ca80..b5691677 100755
--- a/daemon/ns3/examples/ns3wifi.py
+++ b/daemon/ns3/examples/ns3wifi.py
@@ -17,7 +17,7 @@ To run with the CORE GUI:
     # in another terminal
     core-daemon -e ./ns3wifi.py
     # in a third terminal
-    core
+    core-gui
     # now select the running session
 
 """
@@ -29,7 +29,8 @@ import ns.core
 
 from core import logger
 from core.misc import ipaddress
-
+from core.misc import nodeutils
+from core.misc import nodemaps
 from corens3.obj import Ns3Session
 from corens3.obj import Ns3WifiNet
 
@@ -51,7 +52,8 @@ def wifisession(opt):
     """
     Run a test wifi session.
     """
-    session = Ns3Session(persistent=True, duration=opt.duration)
+    nodeutils.set_node_map(nodemaps.NODES)
+    session = Ns3Session(1, persistent=True, duration=opt.duration)
     session.name = "ns3wifi"
     session.filename = session.name + ".py"
     session.node_count = str(opt.numnodes + 1)
diff --git a/daemon/ns3/examples/ns3wifirandomwalk.py b/daemon/ns3/examples/ns3wifirandomwalk.py
index fc37cce4..18f473ad 100755
--- a/daemon/ns3/examples/ns3wifirandomwalk.py
+++ b/daemon/ns3/examples/ns3wifirandomwalk.py
@@ -19,6 +19,8 @@ import ns.network
 
 from core import logger
 from core.misc import ipaddress
+from core.misc import nodemaps
+from core.misc import nodeutils
 from corens3.obj import Ns3Session
 from corens3.obj import Ns3WifiNet
 
@@ -40,7 +42,8 @@ def wifisession(opt):
     """
     Run a random walk wifi session.
     """
-    session = Ns3Session(persistent=True, duration=opt.duration)
+    nodeutils.set_node_map(nodemaps.NODES)
+    session = Ns3Session(1, persistent=True, duration=opt.duration)
     session.name = "ns3wifirandomwalk"
     session.filename = session.name + ".py"
     session.node_count = str(opt.numnodes + 1)
diff --git a/daemon/ns3/examples/ns3wimax.py b/daemon/ns3/examples/ns3wimax.py
index 01609398..d3d165a9 100755
--- a/daemon/ns3/examples/ns3wimax.py
+++ b/daemon/ns3/examples/ns3wimax.py
@@ -14,6 +14,8 @@ import sys
 
 from core import logger
 from core.misc import ipaddress
+from core.misc import nodemaps
+from core.misc import nodeutils
 from corens3.obj import Ns3Session
 from corens3.obj import Ns3WimaxNet
 
@@ -22,7 +24,8 @@ def wimaxsession(opt):
     """
     Run a test wimax session.
     """
-    session = Ns3Session(persistent=True, duration=opt.duration)
+    nodeutils.set_node_map(nodemaps.NODES)
+    session = Ns3Session(1, persistent=True, duration=opt.duration)
     wimax = session.add_object(cls=Ns3WimaxNet, name="wlan1")
     # wimax.wimax.EnableLogComponents()
 
diff --git a/doc/scripting.rst b/doc/scripting.rst
index 8879981c..f5620a1a 100644
--- a/doc/scripting.rst
+++ b/doc/scripting.rst
@@ -40,7 +40,7 @@ Here are the basic elements of a CORE Python script:
   from core.session import Session
   from core.netns import nodes
 
-  session = Session(persistent=True)
+  session = Session(1, persistent=True)
   node1 = session.add_object(cls=nodes.CoreNode, name="n1")
   node2 = session.add_object(cls=nodes.CoreNode, name="n2")
   hub1 = session.add_object(cls=nodes.HubNode, name="hub1")