Got RuntimeError when running command-line tool ale-import-roms

[ZM-J]

Hi! I followed the instructions "Deep Q-Learning for Atari Breakout" from Keras. The source code requires atari-py, but it seems that ale-py, i.e., this repo, is recommended. Therefore, I pip-installed this repo, and tried running

ale-import-roms .\ROMS\

However, I got a RuntimeError:

Traceback (most recent call last):
  File "D:\Software\Anaconda\lib\runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "D:\Software\Anaconda\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "D:\Software\Anaconda\Scripts\ale-import-roms.exe\__main__.py", line 7, in <module>
  File "D:\Software\Anaconda\lib\site-packages\ale_py\scripts\import_roms.py", line 93, in main
    import_roms(romdir, datadir, pkg=args.import_from_pkg, dry_run=args.dry_run)
  File "D:\Software\Anaconda\lib\site-packages\ale_py\scripts\import_roms.py", line 25, in import_roms
    rom = ale_py.ALEInterface.isSupportedROM(path)
RuntimeError

I got the ROMs in the Atari 2600 VCS ROM Collection.