Ionic2 rc.0 build android ngc error

ngc error: Error: Error at D:/app location/.tmp/node_modules/ionic-angular/components/button/button.ngfactory.ts:61:18: ‘rootSelector’ is declared but neve
r used

Notes >
1º - Already reinstall all node modules
2º - Already delete .tmp folter (it’s recreated)

Ionic serve run without errors