# \[Error - iOS\]: WowzaGoCoderSDK: Invalid license key format! -

**URL:** <https://community.wowza.com/t/error-ios-wowzagocodersdk-invalid-license-key-format/52388>\
**Category:** Wowza GoCoder SDK\
**Created:** [November 28, 2018, 3:56am UTC](https://community.wowza.com/t/error-ios-wowzagocodersdk-invalid-license-key-format/52388 "2018-11-28T03:56:05Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![daule\_bap](https://avatars.discourse-cdn.com/v4/letter/d/c68b51/32.png) [@daule\_bap](https://community.wowza.com/u/daule_bap)\
**Post date:** [November 28, 2018, 3:56am UTC](https://community.wowza.com/t/error-ios-wowzagocodersdk-invalid-license-key-format/52388/1 "2018-11-28T03:56:05Z")

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I have issue **WowzaGoCoderSDK: Invalid license key format! but i encountered it some time. Why and how to resolve it?**

**Thank!**

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**Author:** ![Rose\_Power-Wowza\_Com](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/rose_power-wowza_com/32/431_2.png) [@Rose\_Power-Wowza\_Com](https://community.wowza.com/u/Rose_Power-Wowza_Com)\
**Post date:** [November 28, 2018, 7:37pm UTC](https://community.wowza.com/t/error-ios-wowzagocodersdk-invalid-license-key-format/52388/2 "2018-11-28T19:37:18Z")

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Hello @daule bap, I am not sure I understand…you entered your License key in the SDK and you received this error I assume.

Did you follow this step?

**Next, register your GoCoder SDK license and initialize the SDK by adding the following to the viewDidLoad method of the ViewController class in ViewController.m, replacing GOSK-XXXX-XXXX-XXXX-XXXX-XXXX with your registered license key.**

You can see an image of this step here:

[https://www.wowza.com/docs/how-to-build-a-basic-app-with-gocoder-sdk-for-ios](https://www.wowza.com/docs/how-to-build-a-basic-app-with-gocoder-sdk-for-ios)

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<div class="post-metadata">

**Author:** ![Rose\_Power-Wowza\_Com](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/rose_power-wowza_com/32/431_2.png) [@Rose\_Power-Wowza\_Com](https://community.wowza.com/u/Rose_Power-Wowza_Com)\
**Post date:** [November 28, 2018, 7:39pm UTC](https://community.wowza.com/t/error-ios-wowzagocodersdk-invalid-license-key-format/52388/3 "2018-11-28T19:39:01Z")

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Here is a video as well that shows how to do this. If you still get an error, can you let me know which version of the iOS SDK you have? Thanks.

[https://www.youtube.com/watch?v=h5\_lHaLfoyg](https://www.youtube.com/watch?v=h5_lHaLfoyg)