Cannot determine the module for class X in X.ts! Add X to the NgModule to fix it error in ionic2

Question

I am facing an issue when I try to build my app using the following command :

ionic cordova run android --prod --release

Everything runs fine if

Answer 1

Changed declarations to pages like below and it worked.

declarations: pages

I got the answer at :https://forum.ionicframework.com/t/error-while-running-the-ionic3-app-in-production-mode/106294