Update app.py

app.py

@@ -97,8 +97,11 @@ def _run(file, gk, mk, gek, n_trials, progress=gr.Progress(track_tqdm=True)):
     sp = r.get("sheet_paths",{})
     mdf = pd.DataFrame(r.get("mismatch_table",[]))
     progress(1.0, desc="✅ Done!")
-    dl_files = [sp.get(i) for i in [1,2,3,4]] + [r.get("json_path")]
-    return (summary, fig, pfig, tl_show, cdf, s1, s2, s3, s4, dl_files, mdf)
+    dl_files = [f for f in
+        [sp.get(1), sp.get(2), sp.get(3), sp.get(4), r.get("json_path")]
+        if f is not None]
+    return (summary, fig, pfig, tl_show, cdf, s1, s2, s3, s4,
+            dl_files if dl_files else None, mdf)
 
 # ── UI ───────────────────────────────────────────────────────────────────────
 css = ".gradio-container{background:#0d1117!important;color:#c9d1d9!important}" \