Update app.py

app.py

@@ -104,16 +104,15 @@ with tabs[0]:
         excel_buffer = io.BytesIO()
         with pd.ExcelWriter(excel_buffer, engine='xlsxwriter') as writer:
             sorted_df.to_excel(writer, index=False, sheet_name='Shipment Details')
-            writer.save()
-            excel_data = excel_buffer.getvalue()
-        
+        excel_data = excel_buffer.getvalue()
+
         st.download_button(
             label="📥 Download Shipment Details as Excel",
             data=excel_data,
             file_name="shipment_details.xlsx",
             mime="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
-            )
-
+        )
+        
 with tabs[1]:
     st.header("Upload CTN File for Last Mile Summary")
     ctn_file = st.file_uploader("Upload Excel with Last Mile Service", type=["xlsx"], key="ctn_upload")