diff --git a/src/GF/Shell/CommandL.hs b/src/GF/Shell/CommandL.hs
index 79f822c7f..3697c85db 100644
--- a/src/GF/Shell/CommandL.hs
+++ b/src/GF/Shell/CommandL.hs
@@ -5,9 +5,9 @@
 -- Stability   : (stable)
 -- Portability : (portable)
 --
--- > CVS $Date: 2005/08/17 14:43:50 $ 
+-- > CVS $Date: 2005/08/17 15:13:55 $ 
 -- > CVS $Author: aarne $
--- > CVS $Revision: 1.20 $
+-- > CVS $Revision: 1.21 $
 --
 -- (Description of the module)
 -----------------------------------------------------------------------------
@@ -110,7 +110,7 @@ pCommandMsg s = (m,pCommandWords $ words c) where
     "'" : _       -> CTop
     "+" : _       -> CLast
     "mp" : p      -> CMovePosition (readIntList (unwords p))
-    "ct" : p      -> CCopyPosition (readIntList (unwords p))
+    "ct" : p:q:_  -> CCopyPosition (readIntList p) (readIntList q)
     "r" : f : _   -> CRefineWithAtom f
     "w" : f:i : _ -> CWrapWithFun (f, readIntArg i)
     "ch": f : _   -> CChangeHead f
diff --git a/src/GF/Shell/Commands.hs b/src/GF/Shell/Commands.hs
index 2bcf59dba..b1160d151 100644
--- a/src/GF/Shell/Commands.hs
+++ b/src/GF/Shell/Commands.hs
@@ -5,9 +5,9 @@
 -- Stability   : (stable)
 -- Portability : (portable)
 --
--- > CVS $Date: 2005/08/17 14:43:50 $ 
+-- > CVS $Date: 2005/08/17 15:13:55 $ 
 -- > CVS $Author: aarne $
--- > CVS $Revision: 1.40 $
+-- > CVS $Revision: 1.41 $
 --
 -- temporary hacks for GF 2.0
 --
@@ -76,7 +76,7 @@ data Command =
  | CTop
  | CLast
  | CMovePosition [Int]
- | CCopyPosition [Int]
+ | CCopyPosition [Int] [Int]
  | CRefineWithTree String
  | CRefineWithClip Int
  | CRefineWithAtom String
@@ -257,12 +257,13 @@ execECommand env c = case c of
                           in (case et of 
                                 Ok t -> refineByTrees der cgr [t] s
                                 Bad m -> changeMsg [m] s)
-  CCopyPosition p  -> action2command $ \s -> do
+  CCopyPosition p q -> action2command $ \s -> do
                         s1    <- goPosition p s
                         let t  = actTree s1
-                        let compat = actVal s1 == actVal s
+                        s2    <- goPosition q s1
+                        let compat = actVal s1 == actVal s2
                         if compat 
-                          then refineWithTree der cgr t s 
+                          then refineWithTree der cgr t s2
                           else return s 
 
   CRefineParse str   -> \s -> 
diff --git a/src/GF/UseGrammar/Session.hs b/src/GF/UseGrammar/Session.hs
index 4271a0034..e54d0e3fb 100644
--- a/src/GF/UseGrammar/Session.hs
+++ b/src/GF/UseGrammar/Session.hs
@@ -5,9 +5,9 @@
 -- Stability   : (stable)
 -- Portability : (portable)
 --
--- > CVS $Date: 2005/06/11 20:27:05 $ 
+-- > CVS $Date: 2005/08/17 15:13:55 $ 
 -- > CVS $Author: aarne $
--- > CVS $Revision: 1.11 $
+-- > CVS $Revision: 1.12 $
 --
 -- (Description of the module)
 -----------------------------------------------------------------------------
@@ -88,6 +88,7 @@ removeClip n ss@((s,(ts,cb),(i,b)):_) = (s,(ts, drop n cb),(i,b)) : ss
 
 changeMsg :: [String] -> ECommand
 changeMsg m ((s,ts,(_,b)):ss) = (s,ts,(m,b)) : ss   -- just change message
+changeMsg m _                 = (s,ts,(m,b)) : []  where [(s,ts,(_,b))] = initSState
 
 changeView :: ECommand
 changeView ((s,ts,(m,(v,b))):ss) = (s,ts,(m,(v+1,b))) : ss    -- toggle view
@@ -126,7 +127,7 @@ undoCommand :: Int -> ECommand
 undoCommand n ss =
   let k = length ss in
   if k < n 
-     then changeMsg ["cannot go all the way back"] []
+     then changeMsg ["cannot go all the way back"] [last ss]
      else changeMsg ["successful undo"] (drop n ss)
 
 selectCand :: CGrammar -> Int -> ECommand