Index: trunk/zoo-project/zoo-services/ogr/base-vect-ops-py/cgi-env/ogr_sp.py
===================================================================
--- trunk/zoo-project/zoo-services/ogr/base-vect-ops-py/cgi-env/ogr_sp.py	(revision 385)
+++ trunk/zoo-project/zoo-services/ogr/base-vect-ops-py/cgi-env/ogr_sp.py	(revision 388)
@@ -163,5 +163,5 @@
         i+=1
     outputResult(conf,outputs["Result"],rgeometries)
-    return zoo.SUCCEEDED
+    return zoo.SERVICE_SUCCEEDED
 
 def ConvexHullPy(conf,inputs,outputs):
@@ -177,5 +177,5 @@
         i+=1
     outputResult(conf,outputs["Result"],rgeometries)
-    return zoo.SUCCEEDED
+    return zoo.SERVICE_SUCCEEDED
 
 
@@ -201,7 +201,10 @@
         j=0
         while j < len(geometry2):
-            tres=geometry1[i].Union(geometry2[j])
-            if not(tres.IsEmpty()):
-                rgeometries+=[tres]
+            tmp=geometry1[j].Clone()
+            resg=geometry2[i].GetGeometryRef()
+            resg=resg.Union(geometry1[i].GetGeometryRef())
+            tmp.SetGeometryDirectly(resg)
+            if not(resg.IsEmpty()):
+                rgeometries+=[tmp]
             j+=1
         geometry1[i].Destroy()