diff --git a/app/whisper_model.py b/app/whisper_model.py
index c166980..76a9f40 100644
--- a/app/whisper_model.py
+++ b/app/whisper_model.py
@@ -1,5 +1,6 @@
 from ahserver.serverenv import ServerEnv
 from appPublic.worker import awaitify
+from appPublic.log import info, debug, warning, error, exception, critical
 
 from ahserver.globalEnv import get_definition
 import numpy as np
@@ -26,7 +27,9 @@ class WhisperBase:
 		self.model = whisper.load_model(model_name)
 
 	def _stt(self, filepath):
-		pass
+		e = Exception(f'{filepath=} WhisperBase can not use')
+		exception(f'{e=}')
+		raise e
 
 	stt = awaitify(_stt)