Update app.py

app.py

@@ -25,8 +25,14 @@ for d in [model_cache_dir, tool_cache_dir, file_cache_dir, report_dir]:
 os.environ["HF_HOME"] = model_cache_dir
 os.environ["TRANSFORMERS_CACHE"] = model_cache_dir
 
+# Fixed this line - added missing closing parenthesis
 sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "src"))
-from txagent.txagent import TxAgent
+
+try:
+    from txagent.txagent import TxAgent
+except ImportError as e:
+    print(f"Error importing TxAgent: {e}")
+    sys.exit(1)
 
 MAX_MODEL_TOKENS = 32768
 MAX_CHUNK_TOKENS = 8192