diff --git a/dagflow/dagflow.py b/dagflow/dagflow.py
index ac6d4d0..72454eb 100644
--- a/dagflow/dagflow.py
+++ b/dagflow/dagflow.py
@@ -17,7 +17,7 @@ from random import randint
 from appPublic.log import debug, exception, error, info
 from appPublic.timeUtils import timestampstr
 from sqlor.dbpools import get_sor_context
-from asteval import Interpreter, NameNotFound
+from asteval import Interpreter
 
 # 1. 创建一个全局的 Interpreter 实例（复用以提高性能）
 aeval = Interpreter()