diff --git a/scripts/main.py b/scripts/main.py
index 05df742..61aa49d 100755
--- a/scripts/main.py
+++ b/scripts/main.py
@@ -88,6 +88,12 @@ def reset_config(cfg, args):
         cfg.data.transforms = args.transforms
 
 
+def check_cfg(cfg):
+    if cfg.loss.name == 'triplet' and cfg.loss.triplet.weight_x == 0:
+        assert cfg.train.fixbase_epoch == 0, \
+            'The output of classifier is not included in the computational graph'
+
+
 def main():
     parser = argparse.ArgumentParser(
         formatter_class=argparse.ArgumentDefaultsHelpFormatter
@@ -130,6 +136,7 @@ def main():
     reset_config(cfg, args)
     cfg.merge_from_list(args.opts)
     set_random_seed(cfg.train.seed)
+    check_cfg(cfg)
 
     log_name = 'test.log' if cfg.test.evaluate else 'train.log'
     log_name += time.strftime('-%Y-%m-%d-%H-%M-%S')