[Resolved] cross-env is not recognized as an internal or external command, operable program or batch file.

Error message  :

C:\xxxx64\www\test\xxx\2_u\xxx-xxx>npm run dev

> vue-cli@1.0.0 dev C:\xxxx64\www\test\xxx\2_u\xxx-xxx> cross-env NODE_ENV=development webpack-dev-server --open --hot

'cross-env' is not recognized as an internal or external command,
operable program or batch file.

You need install cross-env and make it work globally

 npm install --global cross-env