# Load Testing Error in Windows

**URL:** <https://community.wowza.com/t/load-testing-error-in-windows/36503>\
**Category:** Wowza Streaming Engine\
**Created:** [August 7, 2015, 6:11pm UTC](https://community.wowza.com/t/load-testing-error-in-windows/36503 "2015-08-07T18:11:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Niranjana\_devi](https://avatars.discourse-cdn.com/v4/letter/n/ebca7d/32.png) [@Niranjana\_devi](https://community.wowza.com/u/Niranjana_devi)\
**Post date:** [August 7, 2015, 6:11pm UTC](https://community.wowza.com/t/load-testing-error-in-windows/36503/1 "2015-08-07T18:11:20Z")

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Hi,

I tried to do load testing in my local machines. I followed instructions mentioned in document that sent by wowza to do load test. I was able to do load testing in Mac machine. I am getting error when i tried to run performance.bat live command in windows.

Error details:

Tuning: -Xmx1620M -XX:+UseG1GC -XX:MaxGCPauseMillis=100 -server -Djava.net.pref

erIPv4Stack=true

‘""C:\Program’ is not recognized as an internal or external command,

operable program or batch file.

I tried with Wowza streaming engine 4.2.0

Please help me to solve this.

Thanks,

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**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:** [November 26, 2016, 7:44am UTC](https://community.wowza.com/t/load-testing-error-in-windows/36503/2 "2016-11-26T07:44:01Z")

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Hello!

Thanks for contacting Wowza Forums!

Since you posted this, we have upgraded both the load test tool and Engine versions. I would suggest updating both and re-trying.

[Upgrade Wowza](https://www.wowza.com/docs/how-to-update-your-wowza-streaming-engine-installation)

[Load Test Tool](https://www.wowza.com/docs/how-to-get-flash-rtmp-load-test-tool)

Regards,

Jermaine