C:\Users\Administrator\grunt-in-action\grunt-by-yo>yo webapp grunt-by-yo

module.js:339

    throw err;

    ^

Error: Cannot find module 'readable-stream'

    at Function.Module._resolveFilename (module.js:337:15)

    at Function.Module._load (module.js:287:25)

    at Module.require (module.js:366:17)

    at require (module.js:385:17)

    at Object.<anonymous> (C:\Users\Administrator\AppData\Roaming\npm\node_modul

es\generator-webapp\node_modules\yeoman-generator\node_modules\yeoman-environmen

t\node_modules\mem-fs\node_modules\vinyl-file\node_modules\strip-bom-stream\node

_modules\first-chunk-stream\index.js:3:14)

    at Module._compile (module.js:435:26)

    at Object.Module._extensions..js (module.js:442:10)

    at Module.load (module.js:356:32)

    at Function.Module._load (module.js:311:12)

    at Module.require (module.js:366:17)

    at require (module.js:385:17)