diff --git a/evalscope/config.py b/evalscope/config.py
index 749193e..f696427 100644
--- a/evalscope/config.py
+++ b/evalscope/config.py
@@ -114,7 +114,9 @@ def from_json(json_file: str):
     def from_args(args: Namespace):
         # Convert Namespace to a dictionary and filter out None values
         args_dict = {k: v for k, v in vars(args).items() if v is not None}
-        del args_dict['func']  # Note: compat CLI arguments
+
+        if 'func' in args_dict:
+            del args_dict['func']  # Note: compat CLI arguments
 
         return TaskConfig.from_dict(args_dict)
 
diff --git a/evalscope/models/model_adapter.py b/evalscope/models/model_adapter.py
index d52bdf7..a85fc63 100644
--- a/evalscope/models/model_adapter.py
+++ b/evalscope/models/model_adapter.py
@@ -429,7 +429,7 @@ def _model_generate(self, query: str, infer_cfg: dict) -> str:
         fix_do_sample_warning(self.generation_config)
 
         # Run inference
-        output_ids = self.model.generate(**inputs, generation_config=self.generation_config)
+        output_ids = self.model.generate(input_ids, generation_config=self.generation_config)
 
         response = self.tokenizer.decode(output_ids[0, len(input_ids[0]):], skip_special_tokens=True)
         return response