# Error TS1149

**URL:** <https://forum.ionicframework.com/t/error-ts1149/154483>\
**Category:** ionic-v3\
**Created:** [January 28, 2019, 7:50pm UTC](https://forum.ionicframework.com/t/error-ts1149/154483 "2019-01-28T19:50:02Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![desarrolloSan](https://avatars.discourse-cdn.com/v4/letter/d/65b543/32.png) [@desarrolloSan](https://forum.ionicframework.com/u/desarrolloSan)\
**Post date:** [January 28, 2019, 7:50pm UTC](https://forum.ionicframework.com/t/error-ts1149/154483/1 "2019-01-28T19:50:02Z")

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I do the construction for ios and I get this error:  
TS1149 file name error “” differs from already included file name “” only in casing.  
Does anyone have a solution for this?