Update app.py

app.py

@@ -162,7 +162,7 @@ def convert_ci(by_line_item_file, combined_file, password, max_rows):
     for i, start in enumerate(range(0, len(merged_df), int(max_rows))):
         chunk = merged_df.iloc[start : start + int(max_rows)]
         suffix = chr(65 + i) if i < 26 else f"part{i + 1}"
-        filename = f"{mawb} T01 Manifest - {suffix}.xlsx"
+        filename = f"{invoice_no}-{suffix}.xlsx"
         with pd.ExcelWriter(filename, engine='xlsxwriter') as writer:
             chunk.to_excel(writer, sheet_name="Converted", index=False)
             workbook = writer.book