diff --git a/python/chronos/src/bigdl/chronos/autots/__init__.py b/python/chronos/src/bigdl/chronos/autots/__init__.py
index e2763cacaa1..64293534495 100644
--- a/python/chronos/src/bigdl/chronos/autots/__init__.py
+++ b/python/chronos/src/bigdl/chronos/autots/__init__.py
@@ -14,16 +14,14 @@
 # limitations under the License.
 #
 import warnings
-from bigdl.nano.utils.log4Error import invalidInputError
 import os
 
 
 if os.getenv("LD_PRELOAD", "null") != "null":
-    invalidInputError(False,
-                      errMsg="Users of `bigdl.chronos.autots` should "
-                             "unset bigdl-nano environment variables!",
-                      fixMsg="Please run `source bigdl-nano-unset-env` "
-                             "in your bash terminal")
+    warnings.warn("Users of `bigdl.chronos.autots` should "
+                  "unset bigdl-nano environment variables!"
+                  "Please run `source bigdl-nano-unset-env` "
+                  "in your bash terminal")
 
 try:
     # TODO: make this a LazyImport