# Scripted Fields - Script is invalid

**URL:** <https://discuss.elastic.co/t/scripted-fields-script-is-invalid/237211>\
**Category:** Kibana\
**Created:** [June 16, 2020, 4:25am UTC](https://discuss.elastic.co/t/scripted-fields-script-is-invalid/237211 "2020-06-16T04:25:10Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jjums](https://avatars.discourse-cdn.com/v4/letter/j/c37758/32.png) [@jjums](https://discuss.elastic.co/u/jjums)\
**Post date:** [June 16, 2020, 4:25am UTC](https://discuss.elastic.co/t/scripted-fields-script-is-invalid/237211/1 "2020-06-16T04:25:10Z")

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Hello,

I'm not a developer, so I'm not familiar with program language.  
I added several scripted fields.  
I tried to add a new scripted field, but I can't.  
"Script is invalid."  
Following is an err.

 ![peak_kibana](https://us1.discourse-cdn.com/elastic/original/3X/2/7/27e17622cdba98c7e230524520fc0a44b9711ce7.png)

How can I solve this problem?  
Some documents don't have the peak(original field) value, just null (-).  
Please, let me know how can I edit my script.

Thank you so much!

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<div class="post-metadata">

**Author:** ![flash1293](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/flash1293/32/41227_2.png) [@flash1293](https://discuss.elastic.co/u/flash1293)\
**Post date:** [June 16, 2020, 7:26am UTC](https://discuss.elastic.co/t/scripted-fields-script-is-invalid/237211/2 "2020-06-16T07:26:54Z")

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The `reason` property to the bottom of your screenshot is a good description of the problem. You are trying to access the `peak` field, but not all documents in your index have that field.

You should be able to fix your script by adding

```auto
if (doc['peak'].size() == 0) { return null; }

```

to the top

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<div class="post-metadata">

**Author:** ![jjums](https://avatars.discourse-cdn.com/v4/letter/j/c37758/32.png) [@jjums](https://discuss.elastic.co/u/jjums)\
**Post date:** [June 17, 2020, 4:17am UTC](https://discuss.elastic.co/t/scripted-fields-script-is-invalid/237211/3 "2020-06-17T04:17:51Z")

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Thank you so much!! It works!

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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:** [July 15, 2020, 4:22am UTC](https://discuss.elastic.co/t/scripted-fields-script-is-invalid/237211/4 "2020-07-15T04:22:39Z")

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