Error training using the nuscenes-mini dataset

[Cxb0219]

Thank you for your excellent work！
I am running "nusc_newsplit_480_60x30_24e.py" using the nuscenes-mini dataset to change to single-card training, but there is no result when the training goes to "evaluating 3 categories". And I can't find the "tmp_gts_nusc_60*30_newsplit.pkl" file. Do you know what's wrong?

[>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>]81/81, 3.9 task/s, elapsed: 21s, ETA:0slen of the results 81
saving submissions results to ./work_dirs/nusc_newsplit_480_60x30_24e/submission_vector.jsoncollected 81 samples in 0.00s
loading cached gts from ./tmp_gts_nusc_60x30_newsplit.pkl
evaluating 3 categories...
[ ]0/3, elapsed: 0s, ETA:

[yuantianyuan01]

Hi, thanks for your interest in our work!

If you find your program stuck at evaluating 3 categories, it could be due to your device not supporting multi-processing. Try disabling multi-processing in the evaluation code. Additionally, the message 'loading cached gts from ./tmp_gts_nusc_60x30_newsplit.pkl' suggests that the program expects this file to exist.