Hi,I converted my data set to wireframe format and encountered the following error.I have converted the json format to hdf5 format with offset, line_level, df,but an error is reported. I don't know why.

Traceback (most recent call last):
File "/root/miniconda3/envs/deeplsd/lib/python3.9/runpy.py", line 197, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/root/miniconda3/envs/deeplsd/lib/python3.9/runpy.py", line 87, in _run_code
exec(code, run_globals)
File "/root/lys/DeepLSD/deeplsd/scripts/train.py", line 252, in
training(conf, output_dir, args)
File "/root/lys/DeepLSD/deeplsd/scripts/train.py", line 116, in training
train_loader = dataset.get_data_loader('train')
File "/root/lys/DeepLSD/deeplsd/datasets/wireframe_ha.py", line 99, in get_data_loader
return DataLoader(self.get_dataset(split), batch_size=batch_size,
File "/root/miniconda3/envs/deeplsd/lib/python3.9/site-packages/torch/utils/data/dataloader.py", line 376, in init
sampler = RandomSampler(dataset, generator=generator) # type: ignore[arg-type]
File "/root/miniconda3/envs/deeplsd/lib/python3.9/site-packages/torch/utils/data/sampler.py", line 164, in init
raise ValueError(
ValueError: num_samples should be a positive integer value, but got num_samples=0