Error # could not open .tmp/.index/knn.index for reading: No such file or directory

[siddgarg88]

When I ran the training wrapper as below, it gave me error

wrapper = TrainingWrapper(
retro = retro, # path to retro instance
knn = 2, # knn (2 in paper was sufficient)
chunk_size = 64, # chunk size (64 in paper)
documents_path = "/home/AD/siddgarg/Retro", # path to folder of text
glob = '**/train_text_admission_v2.txt',
chunks_memmap_path = './train.chunks.dat',
seqs_memmap_path = './train.seq.dat',
doc_ids_memmap_path = './train.doc_ids.dat',
max_chunks = 1_000_000, # maximum cap to chunks
max_seqs = 100_000, # maximum seqs
knn_extra_neighbors = 100, # num extra neighbors to fetch
max_index_memory_usage = '100m',
processed_stats_json_path = './processed-stats3.json',
current_memory_available = '1G'
)

could not open .tmp/.index/knn.index for reading: No such file or directory