previous version with only nucmonitor

app.py

@@ -690,7 +690,7 @@ def run_app():
 
 
         # Save the DataFrame to the BytesIO object as an Excel file
-        df_nucmonitor_2.to_excel(excel_buffer, index=True)
+        df_nucmonitor.to_excel(excel_buffer, index=True)
         # Set the cursor position to the beginning of the BytesIO object
         excel_buffer.seek(0)