build_backbone

[dongxiaofei12]

Traceback (most recent call last):
File "/home/badwater/lw/mmsegmentation-main/mmseg/unet.py", line 32, in
main()
File "/home/badwater/lw/mmsegmentation-main/mmseg/unet.py", line 26, in main
model = build_backbone(backbone_cfg)
File "/home/badwater/lw/mmsegmentation-main/mmseg/models/builder.py", line 17, in build_backbone
return BACKBONES.build(cfg)
File "/home/badwater/miniconda3/envs/mmseg/lib/python3.8/site-packages/mmengine/registry/registry.py", line 570, in build
return self.build_func(cfg, *args, **kwargs, registry=self)
File "/home/badwater/miniconda3/envs/mmseg/lib/python3.8/site-packages/mmengine/registry/build_functions.py", line 232, in build_model_from_cfg
return build_from_cfg(cfg, registry, default_args)
File "/home/badwater/miniconda3/envs/mmseg/lib/python3.8/site-packages/mmengine/registry/build_functions.py", line 121, in build_from_cfg
obj = obj_cls(**args) # type: ignore
File "/home/badwater/lw/mmsegmentation-main/mmseg/models/backbones/unet.py", line 370, in init
UpConvBlock(
File "/home/badwater/lw/mmsegmentation-main/mmseg/models/utils/up_conv_block.py", line 77, in init
self.upsample = build_upsample_layer(
File "/home/badwater/miniconda3/envs/mmseg/lib/python3.8/site-packages/mmcv/cnn/bricks/upsample.py", line 85, in build_upsample_layer
raise KeyError(f'Cannot find {upsample} in registry under scope '
KeyError: 'Cannot find None in registry under scope name mmengine'
Why do I encounter this error when building UNet? However, I had no issues during training.