diff --git a/djimaging/tables/core/preprocesstraces.py b/djimaging/tables/core/preprocesstraces.py
index 9aa19e8..b848b40 100644
--- a/djimaging/tables/core/preprocesstraces.py
+++ b/djimaging/tables/core/preprocesstraces.py
@@ -149,7 +149,7 @@ def gui_clip_trace(self, key):
 
         @widgets.interact(left=w_left, right=w_right, save=w_save)
         def plot_fit(left=0, right=trace.size - 1, save=False):
-            nonlocal title, key
+            nonlocal title
 
             plot_left_right_clipping(trace, trace_t, left, right, title)
 
diff --git a/djimaging/tables/core/traces.py b/djimaging/tables/core/traces.py
index 69d7cd3..cff8fe5 100644
--- a/djimaging/tables/core/traces.py
+++ b/djimaging/tables/core/traces.py
@@ -177,7 +177,7 @@ def gui_clip_trace(self, key):
 
         @widgets.interact(left=w_left, right=w_right, save=w_save)
         def plot_fit(left=0, right=trace.size - 1, save=False):
-            nonlocal title, key
+            nonlocal title
 
             plot_left_right_clipping(trace, trace_t, left, right, title)
 
diff --git a/djimaging/tables/ipl/ipl.py b/djimaging/tables/ipl/ipl.py
index 74004ed..00d2e2b 100644
--- a/djimaging/tables/ipl/ipl.py
+++ b/djimaging/tables/ipl/ipl.py
@@ -98,7 +98,7 @@ def gui(self, key, figsize=(8, 5), left0=12, right0=12, thick0=30, q_clip0=2.0,
 
         @widgets.interact(bot=w_bot, top=w_top, thick=w_thick, save=w_save)
         def plot_fit(left=left0, right=right0, thick=thick0, save=False):
-            nonlocal title, key, add_or_update
+            nonlocal title
 
             plot_field_and_fit(left, right, thick, ch0_avg, ch1_avg, figsize=figsize, extent=extent, title=title)