# Licence key is not valid for version 4 **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [February 17, 2018, 7:16am UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780 "2018-02-17T07:16:21Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![fawad\_Aslam1](https://avatars.discourse-cdn.com/v4/letter/f/c67d28/32.png) [@fawad\_Aslam1](https://community.wowza.com/u/fawad_Aslam1)\ **Post date:** [February 17, 2018, 7:16am UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780/1 "2018-02-17T07:16:21Z")
wowzaticket.png Please help Accordingly ---
**Author:** ![Jermaine\_Hemby](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@Jermaine\_Hemby](https://community.wowza.com/u/Jermaine_Hemby)\ **Post date:** [February 18, 2018, 12:55pm UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780/2 "2018-02-18T12:55:31Z")
Hello, Thanks for contacting the Wowza Community What version are you installing from? We had a fix for this issue in the lastest version. You can download the latest version installer [HERE](https://www.wowza.com/pricing/installer) regards, Jermaine ---
**Author:** ![Trevor\_McCready](https://avatars.discourse-cdn.com/v4/letter/t/ce7236/32.png) [@Trevor\_McCready](https://community.wowza.com/u/Trevor_McCready)\ **Post date:** [March 2, 2018, 3:48am UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780/3 "2018-03-02T03:48:17Z")
I am receiving the same error, trying to install 4.7.4 which I download from the location you pointed to. I’m trying to so a silent install using the silent key that I was given after signing the agreement. ---
**Author:** ![Uvin\_Withana](https://avatars.discourse-cdn.com/v4/letter/u/5e9695/32.png) [@Uvin\_Withana](https://community.wowza.com/u/Uvin_Withana)\ **Post date:** [November 1, 2019, 3:36pm UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780/4 "2019-11-01T15:36:30Z")
I am trying to install 4.7.7 on Windows and running into the same issue? My license key is not even in this format. This is what I received in the email : XXXX2-xxxxx-xxxxx-xxxxx-xxxxx-xxxxx (last block is only 5 digits whereas the installer is expecting another longer block at the end) No solution for this after 1 year? ---
**Author:** ![Jason\_Tuchler](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/jason_tuchler/32/462_2.png) [@Jason\_Tuchler](https://community.wowza.com/u/Jason_Tuchler)\ **Post date:** [November 1, 2019, 3:45pm UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780/5 "2019-11-01T15:45:21Z")
Hello @Uvin Withana I would recommend reviewing this license troubleshooting part of this guide: [https://www.wowza.com/docs/how-to-troubleshoot-wowza-streaming-engine-installation#licensing](https://www.wowza.com/docs/how-to-troubleshoot-wowza-streaming-engine-installation#licensing) If having further issues, please open a support ticket [here](https://www.wowza.com/support/open-ticket) with the below support info: C:/Users/[UserName]/AppData/Local Temp/bitrock\_installer.log Regards, JasonT ---
**Author:** ![Uvin\_Withana](https://avatars.discourse-cdn.com/v4/letter/u/5e9695/32.png) [@Uvin\_Withana](https://community.wowza.com/u/Uvin_Withana)\ **Post date:** [November 1, 2019, 4:03pm UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780/6 "2019-11-01T16:03:52Z")
I am stuck at the installer @Jason Tuchler so this troubleshooting guide is not applicable here. ---
**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 1, 2019, 4:19pm UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780/7 "2019-11-01T16:19:16Z")
Hi @Uvin Withana sorry you are having an issue. Let me check your account and see what license key was sent to you and check it is valid. I’ll respond again shortly. ---
**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 1, 2019, 4:35pm UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780/8 "2019-11-01T16:35:25Z")
You should have received TWO emails @Uvin Withana. One is the Engine license key and it begins with **XXXX4**. The second email you receive is the Wowza Player key that begins with **XXXX2.** Is it possible since you posted an example with a 2 in it that you are entering the Player key instead of the Engine license key? I will resend you your Engine key license email in case you didn’t see it for some reason. That is what our engineer @Jason Tuchler was suggesting in that troubleshooting doc. It should have a 4, not a 2. Hope that helps you and please let me know. ---
**Author:** ![Uvin\_Withana](https://avatars.discourse-cdn.com/v4/letter/u/5e9695/32.png) [@Uvin\_Withana](https://community.wowza.com/u/Uvin_Withana)\ **Post date:** [November 1, 2019, 4:38pm UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780/9 "2019-11-01T16:38:17Z")
Thanks @Jason Tuchler & @Rose Power-Wowza Community Manager I received a new key via email and I was able to install and run the application fine! Thanks! ---
**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 1, 2019, 5:13pm UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780/10 "2019-11-01T17:13:15Z")
Fantastic!! Glad you reached out so we could help. Have fun now streaming. 🙂 ---
**Author:** ![Lalit\_Kumar2](https://avatars.discourse-cdn.com/v4/letter/l/d26b3c/32.png) [@Lalit\_Kumar2](https://community.wowza.com/u/Lalit_Kumar2)\ **Post date:** [November 16, 2019, 8:35am UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780/11 "2019-11-16T08:35:04Z")
I have also got only one mail for lincense key and it version 2 key. I am getting error “This key is not valid for version 4”. So please let me know what should i do? I will wait for your solutions. Your response is very valuable for us. Thanks & Regards ---
**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 18, 2019, 4:48pm UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780/12 "2019-11-18T16:48:11Z")
We haven’t sent a version 2 email for Engine in years @Lalit Kumar so the key you’re getting in that email is for the Player key. That always has the XXXX2 in it. If you didn’t get an email with an Engine license key which always includes XXXX4, then please email [billing@wowza.com](mailto:billing@wowza.com) and they will resend it to you. ---
**Author:** ![Shyamsundar\_Nirala](https://avatars.discourse-cdn.com/v4/letter/s/a9a28c/32.png) [@Shyamsundar\_Nirala](https://community.wowza.com/u/Shyamsundar_Nirala)\ **Post date:** [August 13, 2020, 12:03pm UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780/13 "2020-08-13T12:03:21Z")
i registered in trial mode but i am not getting trial licence key please provide me. ---
**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:** [August 13, 2020, 3:55pm UTC](https://community.wowza.com/t/licence-key-is-not-valid-for-version-4/50780/14 "2020-08-13T15:55:57Z")
Perhaps the email with the license key went to your spam email as sometimes happens? Can you check? You can email [customerservice@wowza.com](mailto:customersupport@wowza.com) to have them send you another email if you are unable to find it.