# Extra serve options "- -oss" must have a value

**URL:** <https://discuss.elastic.co/t/extra-serve-options-oss-must-have-a-value/187338>\
**Category:** Kibana\
**Created:** [June 25, 2019, 1:16pm UTC](https://discuss.elastic.co/t/extra-serve-options-oss-must-have-a-value/187338 "2019-06-25T13:16:28Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![dkelsen](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dkelsen/32/46291_2.png) [@dkelsen](https://discuss.elastic.co/u/dkelsen)\
**Post date:** [June 25, 2019, 1:16pm UTC](https://discuss.elastic.co/t/extra-serve-options-oss-must-have-a-value/187338/1 "2019-06-25T13:16:28Z")

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Hi,

I'm trying to launch the open-source Kibana dev server for plugin development using yarn start --oss. However, I'm getting the following error:

```
$ plugin-helpers start --oss

  Usage: serve [options]

  Run the kibana server

  Options:
   [..........bunch of command options here]

 ERROR Extra serve options "--oss" must have a value

undefined

Done in 5.25s.

```

I'm doing this on version 6.5.4

Regards,  
Dilshan

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<div class="post-metadata">

**Author:** ![devesh37](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/devesh37/32/56685_2.png) [@devesh37](https://discuss.elastic.co/u/devesh37)\
**Post date:** [July 4, 2019, 2:57am UTC](https://discuss.elastic.co/t/extra-serve-options-oss-must-have-a-value/187338/2 "2019-07-04T02:57:42Z")

</div>

How Did You solve the problem? I am also getting same problem.  
Steps Which i followed:-

1. Copied the existing working with --oss repository
2. Running yarn --oss --dev using VS Code.

---

<div class="post-metadata">

**Author:** ![dkelsen](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dkelsen/32/46291_2.png) [@dkelsen](https://discuss.elastic.co/u/dkelsen)\
**Post date:** [July 10, 2019, 11:54am UTC](https://discuss.elastic.co/t/extra-serve-options-oss-must-have-a-value/187338/3 "2019-07-10T11:54:42Z")

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This problem still hasn't been solved. 🙁

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [August 7, 2019, 11:54am UTC](https://discuss.elastic.co/t/extra-serve-options-oss-must-have-a-value/187338/4 "2019-08-07T11:54:43Z")

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