# How to trace NullInjectorError which appears in Production environment only

**URL:** <https://forum.ionicframework.com/t/how-to-trace-nullinjectorerror-which-appears-in-production-environment-only/245480>\
**Category:** Ionic Angular\
**Created:** [December 5, 2024, 8:47am UTC](https://forum.ionicframework.com/t/how-to-trace-nullinjectorerror-which-appears-in-production-environment-only/245480 "2024-12-05T08:47:53Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![giammariomarini](https://avatars.discourse-cdn.com/v4/letter/g/0ea827/32.png) [@giammariomarini](https://forum.ionicframework.com/u/giammariomarini)\
**Post date:** [December 31, 2024, 2:44pm UTC](https://forum.ionicframework.com/t/how-to-trace-nullinjectorerror-which-appears-in-production-environment-only/245480/11 "2024-12-31T14:44:25Z")

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yesss, I tried “optimization”:false in angular.json file and it’s worked for me!!

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