# Error starting stream in sandbox

**URL:** <https://community.wowza.com/t/error-starting-stream-in-sandbox/54893>\
**Category:** Wowza ClearCaster Pro\
**Created:** [March 30, 2020, 1:52pm UTC](https://community.wowza.com/t/error-starting-stream-in-sandbox/54893 "2020-03-30T13:52:03Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Vardan\_Vardan](https://avatars.discourse-cdn.com/v4/letter/v/b782af/32.png) [@Vardan\_Vardan](https://community.wowza.com/u/Vardan_Vardan)\
**Post date:** [March 30, 2020, 1:52pm UTC](https://community.wowza.com/t/error-starting-stream-in-sandbox/54893/1 "2020-03-30T13:52:03Z")

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Hi everyone, I am new to Wowza. So I have created a stream using wowza sandbox in trial mode, but when I attempt to start stream an error occurs ‘We encountered a problem while starting test123.’, with such system message:

Transcoder Starting FAILED: Instance id: 9608/i\_da2f24f3\_mock Transcoder id: 21127 WSC Override NameError:+ stacktrace:file:/apps/artifacts/cmgr2/cmgr2\_2019-07-15.560.jar!/lib/external/wse\_rest.rb:491:in `create_application';file:/apps/artifacts/cmgr2/cmgr2_2019-07-15.560.jar!/lib/external/wse_rest.rb:141:in `start\_transcoding!’;file:/apps/artifacts/cmgr2/cmgr2\_2019-07-15.560.jar!/lib/external/wse.rb:166:in `start\_transcoder’;/apps/artifacts/cmgr2/cmgr2\_2019-07-15.560.jar!/lib/model/instance.rb:1

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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:** [March 30, 2020, 3:58pm UTC](https://community.wowza.com/t/error-starting-stream-in-sandbox/54893/2 "2020-03-30T15:58:24Z")

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Hello and welcome to Wowza. Your question seems to be about Wowza Streaming Cloud, yet you have tagged Streaming Engine and ClearCaster Pro which are all different products and 3 separate forums.

Kindly repost this question in the correct forum which is Wowza Streaming Cloud to receive assistance from the community- thanks.

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**Author:** ![Mac\_Hill](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/mac_hill/32/434_2.png) [@Mac\_Hill](https://community.wowza.com/u/Mac_Hill)\
**Post date:** [April 9, 2020, 7:56pm UTC](https://community.wowza.com/t/error-starting-stream-in-sandbox/54893/3 "2020-04-09T19:56:42Z")

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Hello,

Wowza Cloud Sandbox is a virtual environment designed only for testing REST API calls. If you attempt to start the “fake” instance, it will fail. Likewise, you cannot actually connect a source to the sandbox environment.

I hope this clarifies.

Mac