diff --git a/crlcore/etc/symbolic/cmos/stratus1.conf b/crlcore/etc/symbolic/cmos/stratus1.conf
index b4e6e23a..69c64b82 100644
--- a/crlcore/etc/symbolic/cmos/stratus1.conf
+++ b/crlcore/etc/symbolic/cmos/stratus1.conf
@@ -7,7 +7,8 @@ import helpers
 parametersTable = \
     ( ("stratus1.format"     , TypeString, "vst")
     , ("stratus1.simulator"  , TypeString, "asimut")
-    ,)
+    , ("stratus1.mappingName", TypeString, os.path.join(helpers.sysConfDir,'symbolic/cmos/stratus2sxlib.xml') )
+    )
 
 
 execfile( helpers.sysConfDir+'/common/stratus1.conf' )
diff --git a/crlcore/etc/symbolic/cmos/stratus2sxlib.xml b/crlcore/etc/symbolic/cmos/stratus2sxlib.xml
new file mode 100644
index 00000000..901f84ea
--- /dev/null
+++ b/crlcore/etc/symbolic/cmos/stratus2sxlib.xml
@@ -0,0 +1,85 @@
+<?xml version="1.0" encoding='us-ascii'?>
+
+<technology name="sxlib">
+    <model name="a2" realcell="a2_x2"        
+           time="434" area="1.7"
+           i0="i0" i1="i1" q="q" vdd="vdd" vss="vss"></model>
+    <model name="a3" realcell="a3_x2"        
+           time="521" area="2"
+           i0="i0" i1="i1" i2="i2" q="q" vdd="vdd" vss="vss"></model>
+    <model name="a4" realcell="a4_x2"        
+           time="578" area="2.3"
+           i0="i0" i1="i1" i2="i2" i3="i3" q="q" vdd="vdd" vss="vss"></model>
+    <model name="na2" realcell="na2_x1"
+           time="288" area="1.3" 
+           i0="i0" i1="i1" nq="nq" vdd="vdd" vss="vss"></model>
+    <model name="na3" realcell="na3_x1"
+           time="363" area="1.7"
+           i0="i0" i1="i1" i2="i2" nq="nq" vdd="vdd" vss="vss"></model>
+    <model name="na4" realcell="na4_x1"
+           time="438" area="2" 
+           i0="i0" i1="i1" i2="i2" i3="i3" nq="nq" vdd="vdd" vss="vss"></model>
+    <model name="o2" realcell="o2_x2"
+           time="406" area="1.7"
+           i0="i0" i1="i1" q="q" vdd="vdd" vss="vss"></model>
+    <model name="o3" realcell="o3_x2"
+           time="506" area="2"
+           i0="i0" i1="i1" i2="i2" q="q" vdd="vdd" vss="vss"></model>
+    <model name="o4" realcell="o4_x2"
+           time="631" area="2.3"
+           i0="i0" i1="i1" i2="i2" i3="i3" q="q" vdd="vdd" vss="vss"></model>
+    <model name="no2" realcell="no2_x1"
+           time="298" area="1.3"
+           i0="i0" i1="i1" nq="nq" vdd="vdd" vss="vss"></model>
+    <model name="no3" realcell="no3_x1" 
+           time="407" area="1.7"
+           i0="i0" i1="i1" i2="i2" nq="nq" vdd="vdd" vss="vss"></model>
+    <model name="no4" realcell="no4_x1"
+           time="499" area="2"
+           i0="i0" i1="i1" i2="i2" i3="i3" nq="nq" vdd="vdd" vss="vss"></model>
+    <model name="xr2" realcell="xr2_x1"
+           time="405" area="3"
+           i0="i0" i1="i1" q="q" vdd="vdd" vss="vss"></model>
+    <model name="nxr2" realcell="nxr2_x1"
+           time="503" area="3"
+           i0="i0" i1="i1" nq="nq" vdd="vdd" vss="vss"></model>
+    <model name="inv" realcell="inv_x1"
+           time="139" area="1"
+           i="i" nq="nq" vdd="vdd" vss="vss"></model>
+    <model name="buf" realcell="buf_x2"
+           time="409" area="1.3"
+           i="i" q="q" vdd="vdd" vss="vss"></model>
+    <model name="zero" realcell="zero_x0"
+           time="0" area="1"
+           nq="nq" vdd="vdd" vss="vss"></model>
+    <model name="one" realcell="one_x0"
+           time="0" area="1"
+           q="q" vdd="vdd" vss="vss"></model>
+    <model name="mx2" realcell="mx2_x2"
+           time="534" area="3"
+           i0="i0" i1="i1" cmd="cmd" q="q" vdd="vdd" vss="vss"></model>
+    <model name="nmx2" realcell="nmx2_x1"
+           time="410" area="2.3"
+           i0="i0" i1="i1" cmd="cmd" nq="nq" vdd="vdd" vss="vss"></model>
+    <model name="halfadder" realcell="halfadder_x2"
+           time="607" area="5.3"
+           a="a" b="b" sout="sout" cout="cout" vdd="vdd" vss="vss"></model>
+    <model name="fulladder" realcell="fulladder_x2"
+           time="1251" area="6.6"
+           a="a1,a2,a3,a4" b="b1,b2,b3,b4" cin="cin1,cin2,cin3" sout="sout" cout="cout" vdd="vdd" vss="vss"></model>
+    <model name="sff1" realcell="sff1_x4"
+           time="476" area="6"
+           i="i" ck="ck" q="q" vdd="vdd" vss="vss"></model>
+    <model name="sff2" realcell="sff2_x4"
+           time="666" area="8"
+           i0="i0" i1="i1" ck="ck" cmd="cmd" q="q" vdd="vdd" vss="vss"></model>
+    <model name="sff3" realcell="sff3_x4"
+           time="950" area="0"
+           i0="i0" i1="i1" i2="i2"  ck="ck" cmd0="cmd0" cmd1="cmd1" q="q" vdd="vdd" vss="vss"></model><!-- pas dans le .lib -->
+    <model name="ts" realcell="ts_x4"
+           time="492" area="3.3"
+           i="i" cmd="cmd" q="q" vdd="vdd" vss="vss"></model>
+    <model name="nts" realcell="nts_x1"
+           time="249" area="2"
+           i="i" cmd="cmd" nq="nq" vdd="vdd" vss="vss"></model>
+</technology>
diff --git a/stratus1/src/stratus/st_model.py b/stratus1/src/stratus/st_model.py
index 37fd9a36..8776c965 100644
--- a/stratus1/src/stratus/st_model.py
+++ b/stratus1/src/stratus/st_model.py
@@ -989,7 +989,8 @@ class Model() :
       raise Exception ( err )
       
     ##### Creation of the instance #####
-#    dict['flags'] = F_MSB_FIRST # When vst driver permits to do F_LSB_FIRST or F_LSB_FIRST TODO
+#   dict['flags'] = F_MSB_FIRST # When vst driver permits to do F_LSB_FIRST or F_LSB_FIRST TODO
+#   dict['flags'] = 0
     
     ## Virtual library ## 
     if modele in BVg :
diff --git a/stratus1/src/stratus/st_placement.py b/stratus1/src/stratus/st_placement.py
index ece77337..192b4e34 100644
--- a/stratus1/src/stratus/st_placement.py
+++ b/stratus1/src/stratus/st_placement.py
@@ -62,7 +62,9 @@ def Place ( ins, sym, ref, plac = FIXED, cell = None ) :
 
   # Error if x and y found not permitted :
   if ref._x % MYPITCH :
-    err = "\n[Stratus ERROR] Place : " + ins._name + " : coordinate x is not a mutiple of PITCH.\n"
+    err = "\n[Stratus ERROR] Place : " + ins._name + " : coordinate x " \
+          + DbU.getValueString(ref._x) + " is not a mutiple of PITCH " \
+          + DbU.getValueString(MYPITCH) + ".\n"
     raise Exception ( err )
 
   if ref._y % MYSLICE :
diff --git a/stratus1/src/stratus/st_ref.py b/stratus1/src/stratus/st_ref.py
index e3c2e9ec..016e1751 100644
--- a/stratus1/src/stratus/st_ref.py
+++ b/stratus1/src/stratus/st_ref.py
@@ -59,8 +59,8 @@ import types
 ###########
 class XY :
   def __init__ ( self, x, y ) :
-    self._x = x
-    self._y = y
+    self._x = DbU.fromLambda(x)
+    self._y = DbU.fromLambda(y)
 
 ##################################
 def GetRefXY ( pathname, refname ) :