diff --git a/script/local.py b/script/local.py
index 0e86826..20ff1d3 100755
--- a/script/local.py
+++ b/script/local.py
@@ -196,14 +196,15 @@ 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(ReadonlyRegisterBase):
-    def doRead(self):
-        return controller.server.baseURL        
 
 if controller.isServerEnabled():
+    import ch.psi.pshell.epics.CAS as CAS
     #CAS.setServerPort(5062)    
+    
+    class ServerUrl(ReadonlyRegisterBase):
+        def doRead(self):
+            return controller.server.baseURL            
+            
     d = ServerUrl()
     d.initialize()        
     cas5 = CAS("PSHELL_OP:SERVER_URL", d, 'string')
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