diff --git a/lib/drawdxf.py b/lib/drawdxf.py
index b407244..41ebe26 100644
--- a/lib/drawdxf.py
+++ b/lib/drawdxf.py
@@ -88,10 +88,10 @@ if __name__ == '__main__':
 
         if not os.path.exists(jpath):
             print("file %s does not exit", jpath)
-            exit
+            exit()
         if not os.path.exists(dxf_path):
             print("file %s does not exit", dxf_path)
-            exit
+            exit()
 
         basename = os.path.splitext(dxf_path)[0]
         timestamp = datetime.now().strftime(basename+"_%Y%m%d-%H%M%S.dxf")