diff --git a/testbench/gui.py b/testbench/gui.py
index e5351b4..6f0be37 100644
--- a/testbench/gui.py
+++ b/testbench/gui.py
@@ -1159,8 +1159,9 @@ class TestbenchGUI(tk.Tk):
                     self._console(msg, "warn")
                 self.after(0, lambda: self._svi_status.config(text=msg))
             except Exception as e:
+                err_msg = f"Error: {e}"
                 self._console(f"Sweep error: {e}", "error")
-                self.after(0, lambda: self._svi_status.config(text=f"Error: {e}"))
+                self.after(0, lambda: self._svi_status.config(text=err_msg))
             finally:
                 self.after(0, self._sweep_vi_done)