Where is instances_train.json for Kitti?

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I want to set with_mask is true to create kitti_dbinfos_train.pkl with box2d_camera.
Following by the code:

    if args.dataset == 'kitti':
        if args.only_gt_database:
            create_groundtruth_database(
                'KittiDataset',
                args.root_path,
                args.extra_tag,
                f'{args.extra_tag}_infos_train.pkl',
                relative_path=False,
                mask_anno_path='instances_train.json',
                with_mask=(args.version == 'mask'))

i use this command to generate dbinfos：
python tools/create_data.py kitti --root-path ./data/kitti --out-dir ./data/kitti --extra-tag kitti --only-gt-database --version mask
then there is a erro:[Errno 2] No such file or directory: './data/kitti\instances_train.json'.
I want to know where/how can i get the instances_train.json ?
Thanks for any help or suggestions.