issues with flag_dynamic and sphere_dynamic dataset

[x9898]

When I tried to run the flag_dynamic case, it has following error:

ValueError: ragged_rank must be non-negative; got 0.

And it seems that the dataset is empty, but the size of flag_dynamic dataset folder is more than 30G.

when i run ds = meshgraphnets.dataset.load_dataset('meshgraphnets/data/sphere_dynamic', 'train') ds I can get the output <DatasetV1Adapter shapes: {node_type: (?, ?, 1), world_pos: (?, ?, 3), cells: (?, ?, 3), mesh_pos: (?, ?, 2)}, types: {node_type: tf.int32, world_pos: tf.float32, cells: tf.int32, mesh_pos: tf.float32}>

[liluo2]

Hi @x9898 ! Have you solved this problem?