# Ionic build fails Supplied parameters do not match any signature of call target

**URL:** <https://forum.ionicframework.com/t/ionic-build-fails-supplied-parameters-do-not-match-any-signature-of-call-target/68333>\
**Category:** ionic-v3\
**Created:** [October 26, 2016, 9:50pm UTC](https://forum.ionicframework.com/t/ionic-build-fails-supplied-parameters-do-not-match-any-signature-of-call-target/68333 "2016-10-26T21:50:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![anthem182](https://avatars.discourse-cdn.com/v4/letter/a/a88e57/32.png) [@anthem182](https://forum.ionicframework.com/u/anthem182)\
**Post date:** [October 26, 2016, 9:50pm UTC](https://forum.ionicframework.com/t/ionic-build-fails-supplied-parameters-do-not-match-any-signature-of-call-target/68333/1 "2016-10-26T21:50:59Z")

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Hello all

I get the error when I try to use ionic build ios.

Looking at root.ngfactory.ts, there is a function with a parameter that I didn’t set.

Any idea? thanks.

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<div class="post-metadata">

**Author:** ![anthem182](https://avatars.discourse-cdn.com/v4/letter/a/a88e57/32.png) [@anthem182](https://forum.ionicframework.com/u/anthem182)\
**Post date:** [October 26, 2016, 10:09pm UTC](https://forum.ionicframework.com/t/ionic-build-fails-supplied-parameters-do-not-match-any-signature-of-call-target/68333/2 "2016-10-26T22:09:31Z")

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Problem solved!

Not sure which one was the solution because I played with a lot of things, but now seems to work!

I do not understand why ionic serve did’t get it.