# Kibana Dev Tools Unknown Key for START\_OBJECT in trigger **URL:** \ **Category:** Kibana\ **Created:** [March 15, 2019, 3:21pm UTC](https://discuss.elastic.co/t/kibana-dev-tools-unknown-key-for-start-object-in-trigger/172557 "2019-03-15T15:21:21Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Mariner191](https://avatars.discourse-cdn.com/v4/letter/m/96bed5/32.png) [@Mariner191](https://discuss.elastic.co/u/Mariner191)\ **Post date:** [March 15, 2019, 3:21pm UTC](https://discuss.elastic.co/t/kibana-dev-tools-unknown-key-for-start-object-in-trigger/172557/1 "2019-03-15T15:21:21Z")
Hello All, Am still brand new to ES, Kibana and Dev Tools. Running a (known OK) advanced watch in Dev Tools, am receiving "Type: parsing exception; Reason: Unknown Key for START\_OBJECT in trigger". To utilize Dev Tools in the future to: test aggregation syntax and output, before placing into advanced watch. Many thanks! ![Elastic_Forum_Image7_Kibana%20Dev%20Tools%20Unknown%20Key%20for%20START_OBJECT%20in%20trigger](https://us1.discourse-cdn.com/elastic/original/3X/2/c/2c9f2ef6a75010f3aa96be2759fac050d2b895d6.jpeg) ---
**Author:** ![lukas](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/lukas/32/6812_2.png) [@lukas](https://discuss.elastic.co/u/lukas)\ **Post date:** [March 20, 2019, 5:19pm UTC](https://discuss.elastic.co/t/kibana-dev-tools-unknown-key-for-start-object-in-trigger/172557/2 "2019-03-20T17:19:08Z")
Usually error messages like this mean you either have an opening or closing brace or bracket that is imbalanced. Have you checked to make sure your JSON is valid? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [April 17, 2019, 5:19pm UTC](https://discuss.elastic.co/t/kibana-dev-tools-unknown-key-for-start-object-in-trigger/172557/3 "2019-04-17T17:19:16Z")
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