diff --git a/script/local.py b/script/local.py
index 238538c..0e86826 100755
--- a/script/local.py
+++ b/script/local.py
@@ -198,16 +198,12 @@ def add_convex_hull_plot(title, x,y, name=None, clear = False, x_range = None, y
 #CAS
 import ch.psi.pshell.epics.CAS as CAS
 
-class ServerUrl(Readable):
+class ServerUrl(ReadonlyRegisterBase):
     def doRead(self):
         return controller.server.baseURL        
 
-class ServerUrl(Readable):
-    def read(self):        
-        return controller.server.baseURL        
-        
 if controller.isServerEnabled():
     #CAS.setServerPort(5062)    
     d = ServerUrl()
-    #d.initialize()        
+    d.initialize()        
     cas5 = CAS("PSHELL_OP:SERVER_URL", d, 'string')
\ No newline at end of file