Angular 4 error - ERROR in ./src/main.ts Module not found: Error: Can't resolve './$$_gendir/app/app.module.ngfactory'

Question

During the angular build for production (ng build --prod) I get this error:

ERROR in ./src/main.ts
Module not found: Error: Can't resolve './$$_gendir/app/app.module.ngfactory' in '/Applications/MAMP/htdocs/bandpay/stg-bandpay-client/src'
 @ ./src/main.ts 3:0-74
 @ multi ./src/main.ts

....

what does that mean, how to resolve that?

Answer 1

Solved by: ng build --env=prod