无法打开train.lua：没有这样的文件或目录

当我运行

th train.lua -data_file data/demo-train.hdf5 -val_data_file data/demo -val.hdf5 -savefile demo-model

它输出以下内容：

/home/XXX/torch/install/bin/luajit: cannot open train.lua: No such file or directory
stack traceback:
    [C]: in function 'dofile'
    .../XXX/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:150: in main chunk
    [C]: at 0x55a17891c570

我使用cuda工具包10.2，ubuntu 18.04，lua 5.4.2