我在 Windows 7 上有一个 RN 开发环境。它工作正常，直到昨天在我运行“反应本机”启动后突然报告错误。错误消息：

[2016-12-26 09:58:17]         HMR Server listening on /hot

React packager ready.

fs.js:557
  return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode);
                 ^

Error: UNKNOWN: unknown error, open 'C:\Users\xitao\.babel.json'
    at Object.fs.openSync (fs.js:557:18)
    at Object.fs.writeFileSync (fs.js:1222:33)
    at save (C:\RN\LearnRN\node_modules\babel-register\lib\cache.js:45:16)
    at _combinedTickCallback (internal/process/next_tick.js:67:7)
    at process._tickCallback (internal/process/next_tick.js:98:9)
fs.js:557
  return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode);
                 ^

Error: UNKNOWN: unknown error, open 'C:\Users\xitao\.babel.json'
    at Object.fs.openSync (fs.js:557:18)
    at Object.fs.writeFileSync (fs.js:1222:33)
    at save (C:\RN\LearnRN\node_modules\babel-register\lib\cache.js:45:16)
    at _combinedTickCallback (internal/process/next_tick.js:67:7)
    at process._tickCallback (internal/process/next_tick.js:98:9)
fs.js:557
  return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode);
                 ^

Error: UNKNOWN: unknown error, open 'C:\Users\xitao\.babel.json'
    at Object.fs.openSync (fs.js:557:18)
    at Object.fs.writeFileSync (fs.js:1222:33)
    at save (C:\RN\LearnRN\node_modules\babel-register\lib\cache.js:45:16)
    at _combinedTickCallback (internal/process/next_tick.js:67:7)
    at process._tickCallback (internal/process/next_tick.js:98:9)

我谷歌错误，没有运气。我删除了. babel.json，错误仍然出现。我重新开始了一个新项目，还是老样子。我卸载node.js和python，然后按照RN主页上的“入门”重新安装，还是一样。我安装react-native-cli 2.0.1和1.3.0，还是一样的。

似乎RN项目即使有错误也能工作。但是你永远不知道什么时候这个错误会伤害我的项目。