Update app.py

app.py

@@ -252,9 +252,14 @@ def send_to_model_impl(prompt, model_selection, hf_model_choice, hf_custom_model
         else:
             return "Error: Invalid model selection", None
 
-        with tempfile.NamedTemporaryFile(delete=False, mode='w', suffix='.txt') as f:
-            f.write(summary)
-            download_file = f.name
+        try:  # for file operations
+            with tempfile.NamedTemporaryFile(mode='w+', suffix='.txt', delete=False) as f: # w+ for write and read
+                f.write(summary)
+                f.flush() # Ensure data is written to disk
+                f.seek(0) # Rewind to the beginning of the file
+                download_file = f.name
+        except Exception as file_error:
+            return f"Error creating summary file: {file_error}", None
 
         return summary, download_file