ValueError: need at least one array to concatenate

[LYRgood]

What should I do to resolve this kind of error?

07/27 08:52:47 - mmengine - INFO - paramwise_options -- decode_head.fusion_conv.bn.bias:lr_mult=10.0
Traceback (most recent call last):
File "/data1/dym/LYR/WildScenes-main/scripts/benchmark/train2d.py", line 111, in
main()
File "/data1/dym/LYR/WildScenes-main/scripts/benchmark/train2d.py", line 107, in main
runner.train()
File "/data1/dym/anaconda3/envs/9517_proj/lib/python3.9/site-packages/mmengine/runner/runner.py", line 1742, in train
self._val_loop = self.build_val_loop(
File "/data1/dym/anaconda3/envs/9517_proj/lib/python3.9/site-packages/mmengine/runner/runner.py", line 1562, in build_val_loop
loop = LOOPS.build(
File "/data1/dym/anaconda3/envs/9517_proj/lib/python3.9/site-packages/mmengine/registry/registry.py", line 570, in build
return self.build_func(cfg, *args, **kwargs, registry=self)
File "/data1/dym/anaconda3/envs/9517_proj/lib/python3.9/site-packages/mmengine/registry/build_functions.py", line 121, in build_from_cfg
obj = obj_cls(**args) # type: ignore
File "/data1/dym/anaconda3/envs/9517_proj/lib/python3.9/site-packages/mmengine/runner/loops.py", line 343, in init
super().init(runner, dataloader)
File "/data1/dym/anaconda3/envs/9517_proj/lib/python3.9/site-packages/mmengine/runner/base_loop.py", line 26, in init
self.dataloader = runner.build_dataloader(
File "/data1/dym/anaconda3/envs/9517_proj/lib/python3.9/site-packages/mmengine/runner/runner.py", line 1370, in build_dataloader
dataset = DATASETS.build(dataset_cfg)
File "/data1/dym/anaconda3/envs/9517_proj/lib/python3.9/site-packages/mmengine/registry/registry.py", line 570, in build
return self.build_func(cfg, *args, **kwargs, registry=self)
File "/data1/dym/anaconda3/envs/9517_proj/lib/python3.9/site-packages/mmengine/registry/build_functions.py", line 121, in build_from_cfg
obj = obj_cls(**args) # type: ignore
File "/data1/dym/LYR/WildScenes-main/wildscenes/mmseg_wildscenes/dataset/wildscenes.py", line 93, in init
self.full_init()
File "/data1/dym/anaconda3/envs/9517_proj/lib/python3.9/site-packages/mmengine/dataset/base_dataset.py", line 307, in full_init
self.data_bytes, self.data_address = self._serialize_data()
File "/data1/dym/anaconda3/envs/9517_proj/lib/python3.9/site-packages/mmengine/dataset/base_dataset.py", line 768, in _serialize_data
data_bytes = np.concatenate(data_list)
ValueError: need at least one array to concatenate

[StephenHausler]

Hmm, I've not seen this error before. First, a couple things to check. Suggest placing a breakpoint in mmengine and checking what data is in data_list. Maybe there is no raw data present?
Suggest double checking that you have all raw 2D data files saved ok on your end, also you should check if the symlinks were created correctly by setup_data.py (e.g. make sure the symlinks are active and not broken).