diff --git a/bootstrap/crontab.nightly b/bootstrap/crontab.nightly
new file mode 100644
index 00000000..20287537
--- /dev/null
+++ b/bootstrap/crontab.nightly
@@ -0,0 +1,2 @@
+# Nightly build of Coriolis.
+0 4 * * * ${HOME}/bin/socInstaller.py --nightly --rm-all --benchs > /dev/null 2>&1
diff --git a/bootstrap/socInstaller.py b/bootstrap/socInstaller.py
index 30df34d1..3f3d7b19 100755
--- a/bootstrap/socInstaller.py
+++ b/bootstrap/socInstaller.py
@@ -34,6 +34,7 @@ try:
   import subprocess
   import socket
   import re
+  import bz2
   import smtplib
   from email.mime.text        import MIMEText
   from email.mime.multipart   import MIMEMultipart
@@ -337,6 +338,21 @@ class Configuration ( object ):
         if fd: fd.close()
       return
 
+    def compressLogs ( self ):
+      for log in self._logs.values():
+        if not log: continue
+
+        fd   = open( log, 'r' )
+        bzfd = bz2.BZ2File( log+'.bz2', 'w' )
+
+        for line in fd.readlines(): bzfd.write( line )
+
+        bzfd.close()
+        fd.close()
+
+        os.unlink( log )
+      return
+
 
 class Report ( object ):
 
@@ -500,6 +516,7 @@ try:
         Command( [ 'ssh', host, command ], fd ).execute()
 
     conf.closeLogs()
+
     conf.success = True
 
 except ErrorMessage, e:
@@ -518,4 +535,6 @@ if conf.doSendReport:
   report.attachLog( conf.logs['benchs'] )
   report.send()
 
+conf.compressLogs()
+
 sys.exit( conf.rcode )
diff --git a/stratus1/src/stratus/st_instance.py b/stratus1/src/stratus/st_instance.py
index 983f862b..9c6a0928 100644
--- a/stratus1/src/stratus/st_instance.py
+++ b/stratus1/src/stratus/st_instance.py
@@ -207,7 +207,8 @@ class Inst :
     if not self._st_cell._hur_cell :
       err = "\n[Stratus ERROR] HurricanePlug : Problem of hurricane cell.\nTry to contact Coriolis team.\n"
       raise Exception ( err )
-      
+     
+    UpdateSession.open()
     inst = Instance.create ( self._st_cell._hur_cell
                            , self._name
                            , self._hur_masterCell
@@ -345,7 +346,7 @@ class Inst :
     # Not for vdd/vss in case of utilisation of SetGlobal
     # The detection is done with vst driver in this case ...
     for plug in self._hur_instance.getUnconnectedPlugs():
-      if plug.getMasterNet().getType() not in ( TypePOWER, TypeGROUND ) :
+      if plug.getMasterNet().getType() not in ( Net.Type.POWER, Net.Type.GROUND ) :
         name = str(plug.getMasterNet().getName())
         chaine = re.search ( "(.*)\(", name )
         if chaine : name = chaine.group(1)
@@ -354,6 +355,8 @@ class Inst :
         err += '               (raw name: <%s>)\n' % str(plug.getMasterNet().getName())
         raise Exception ( err )
 
+    UpdateSession.close()
+
   ##############
   ### Prints ###
   ##############
diff --git a/stratus1/src/stratus/st_model.py b/stratus1/src/stratus/st_model.py
index f4fc20de..32476d82 100644
--- a/stratus1/src/stratus/st_model.py
+++ b/stratus1/src/stratus/st_model.py
@@ -274,7 +274,7 @@ class Model :
         direction = net.getDirection()
         name      = str(net.getName())
 
-        if net.getType() in ( TypePOWER, TypeGROUND, TypeCLOCK ) :
+        if net.getType() in ( Net.Type.POWER, Net.Type.GROUND, Net.Type.CLOCK ) :
           found = True
           continue
           
@@ -1199,7 +1199,7 @@ class Model :
         if plug_de_inst.getMasterNet().getDirection() == DirectionIN :
           # ignore vdd and vss
           type = plug_de_inst.getNet().getType()
-          if type not in ( TypePOWER, TypeGROUND ) : net_entree_inst.append ( plug_de_inst.getNet() )
+          if type not in ( Net.Type.POWER, Net.Type.GROUND ) : net_entree_inst.append ( plug_de_inst.getNet() )
 
       ### Deletion of te instance ###
       # If the instance has only one output