# Wowza license key format error

**URL:** <https://community.wowza.com/t/wowza-license-key-format-error/54070>\
**Category:** Wowza Streaming Engine\
**Created:** [October 14, 2019, 5:10pm UTC](https://community.wowza.com/t/wowza-license-key-format-error/54070 "2019-10-14T17:10:12Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Vikas\_Neekhra](https://avatars.discourse-cdn.com/v4/letter/v/a587f6/32.png) [@Vikas\_Neekhra](https://community.wowza.com/u/Vikas_Neekhra)\
**Post date:** [October 14, 2019, 5:10pm UTC](https://community.wowza.com/t/wowza-license-key-format-error/54070/1 "2019-10-14T17:10:12Z")

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Currently I have **WowzaStreamingEngine-4.1.2** installed and need to update it. As the license key was expired in Dev environment so I updated the Server.license file with the new trial key and then I restarted Wowza streaming manager and engine. And I am getting below error when starting wowza streaming engine.

**I added the below key in both format(with square brackets as well) but still getting below error**.

Please suggest what is wrong with the Server.license file.

**Error:-**  
Please enter your License Key in this format:  
XXXXX-XXXXX-XXXXX-XXXXX-XXXXX-XXXXX[-XXXXXXXXXXXX]  
ERROR server comment - error : java.io.IOException: Bad file descriptor|at java.io.FileInputStream.readBytes(Native Method)|at java.io.FileInputStream.read(FileInputStream.java:239)|at java.io.BufferedInputStream.read1(BufferedInputStream.java:273)|at java.io.BufferedInputStream.read(BufferedInputStream.java:334)|at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:282)|

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**Author:** ![Amara\_Graham](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/amara_graham/32/381_2.png) [@Amara\_Graham](https://community.wowza.com/u/Amara_Graham)\
**Post date:** [October 15, 2019, 3:44pm UTC](https://community.wowza.com/t/wowza-license-key-format-error/54070/2 "2019-10-15T15:44:42Z")

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@Vikas Neekhra I removed your license key info from your post. You may want to consider a new trial key as this one should be considered compromised and others may use it.

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**Author:** ![Amara\_Graham](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/amara_graham/32/381_2.png) [@Amara\_Graham](https://community.wowza.com/u/Amara_Graham)\
**Post date:** [October 15, 2019, 3:47pm UTC](https://community.wowza.com/t/wowza-license-key-format-error/54070/3 "2019-10-15T15:47:25Z")

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My Server.license file does not include brackets. Double check there are no spaces or other extraneous characters if you pasted it in.