diff --git a/modelscope/models/cv/nerf_recon_acc/network/nerf.py b/modelscope/models/cv/nerf_recon_acc/network/nerf.py
index 64ffae14..8bf711e8 100644
--- a/modelscope/models/cv/nerf_recon_acc/network/nerf.py
+++ b/modelscope/models/cv/nerf_recon_acc/network/nerf.py
@@ -198,6 +198,8 @@ class VolumeDensity(nn.Module):
 class VolumeRadiance(nn.Module):
 
     def __init__(self, config):
+        import tinycudann as tcnn
+
         super(VolumeRadiance, self).__init__()
         self.config = config
         self.n_dir_dims = 3
diff --git a/modelscope/utils/registry.py b/modelscope/utils/registry.py
index e6556d9c..ae81cfc4 100644
--- a/modelscope/utils/registry.py
+++ b/modelscope/utils/registry.py
@@ -211,4 +211,4 @@ def build_from_cfg(cfg,
             return obj_cls(**args)
     except Exception as e:
         # Normal TypeError does not print class name.
-        raise type(e)(f'{obj_cls.__name__}: {e}')
+        raise type(e)(f'{obj_cls.__name__}: {e}') from e