diff --git a/client/src/Estuary/Render/Renderer.hs b/client/src/Estuary/Render/Renderer.hs
index d8479c9c..1b4fe8a4 100644
--- a/client/src/Estuary/Render/Renderer.hs
+++ b/client/src/Estuary/Render/Renderer.hs
@@ -273,13 +273,12 @@ maybeClearZone :: Int -> (TextNotation,Text,UTCTime) -> R ()
 maybeClearZone z (newNotation,newTxt,_) = do
   mOldDef <- gets (IntMap.lookup z . baseDefinitions)
   case mOldDef of
-    Nothing -> liftIO $ putStrLn "maybeClearZone - no previous definition" -- pure () -- no previous definition so nothing to clear
+    Nothing -> pure () -- no previous definition so nothing to clear
     Just oldDef -> do
       x <- defsSameRenderer z oldDef newNotation newTxt
       case x of
-        True -> liftIO $ putStrLn $ "maybeClearZone - defs have same renderer, " ++ show oldDef ++ ", " ++ show newNotation  -- pure () -- definitions have same renderer so nothing to clear
+        True -> pure () -- definitions have same renderer so nothing to clear
         False -> do
-          liftIO $ putStrLn $ "maybeClearZone - clearing zone: " ++ show oldDef
           clearZone z oldDef
           clearBaseDefinition z
           clearBaseNotation z
@@ -325,14 +324,11 @@ clearZone z (Sequence _) = clearParamPattern z
 clearZone _ _ = return ()
 
 clearTextProgram :: Int -> TextNotation -> R ()
-clearTextProgram z (TidalTextNotation MiniTidal) = do
-  liftIO $ putStrLn "clearTextProgram MiniTidal..."
-  (clearZone' miniTidal) z
+clearTextProgram z (TidalTextNotation MiniTidal) = (clearZone' miniTidal) z
 clearTextProgram z Punctual = (clearZone' punctual) z
 clearTextProgram z CineCer0 = (clearZone' cineCer0) z
 clearTextProgram z Hydra = modify' $ \x -> x { hydras = IntMap.delete z $ hydras x }
 clearTextProgram z LocoMotion = do
-  liftIO $ putStrLn "clearTextProgram LocoMotion..."
   s <- get
   (clearZone' $ exoLangToRenderer LocoMotion $ locoMotion s) z
 clearTextProgram z TransMit = do
diff --git a/client/src/Estuary/Render/TextNotationRenderer.hs b/client/src/Estuary/Render/TextNotationRenderer.hs
index dcdc07d8..03b1f814 100644
--- a/client/src/Estuary/Render/TextNotationRenderer.hs
+++ b/client/src/Estuary/Render/TextNotationRenderer.hs
@@ -11,6 +11,7 @@ import Data.Text
 import Data.Time
 import Data.Time.Clock.POSIX
 import Control.Monad.State.Strict
+import Control.Exception hiding (evaluate)
 
 import Estuary.Types.NoteEvent
 import Estuary.Render.R
@@ -77,7 +78,15 @@ scheduleWebDirtEvents' exoLang z = do
   liftIO $ render exoLang z wStart wEnd
 
 clearZone'' :: ExoLang -> Int -> R ()
-clearZone'' exoLang z = liftIO $ clearZone exoLang z
+clearZone'' exoLang z = do
+  x <- liftIO $ try $ clearZone exoLang z
+  case x of
+    Right () -> pure ()
+    Left exception -> do
+      let msg = "Estuary: exception in clearZone'': " ++ show (exception :: SomeException)
+      liftIO $ putStrLn msg
+      pure ()
+      
 
 preAnimationFrame' :: ExoLang -> R ()
 preAnimationFrame' exoLang = liftIO $ preAnimate exoLang