# Term text cannot contain HOLE character U+001E; or unit separator character U+001F; this character is reserved

**URL:** <https://discuss.elastic.co/t/term-text-cannot-contain-hole-character-u-001e-or-unit-separator-character-u-001f-this-character-is-reserved/252484>\
**Category:** Elasticsearch\
**Created:** [October 19, 2020, 7:05am UTC](https://discuss.elastic.co/t/term-text-cannot-contain-hole-character-u-001e-or-unit-separator-character-u-001f-this-character-is-reserved/252484 "2020-10-19T07:05:01Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Zoltan\_Kovacs](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/zoltan_kovacs/32/76500_2.png) [@Zoltan\_Kovacs](https://discuss.elastic.co/u/Zoltan_Kovacs)\
**Post date:** [October 19, 2020, 7:05am UTC](https://discuss.elastic.co/t/term-text-cannot-contain-hole-character-u-001e-or-unit-separator-character-u-001f-this-character-is-reserved/252484/1 "2020-10-19T07:05:01Z")

</div>

I run today an interesting error message:

> Term text cannot contain HOLE character U+001E; this character is reserved

> Term text cannot contain unit separator character U+001F; this character is reserved

in search suggesters

```auto
    {
    	"suggest":{
    		"regex":{
    			"regex":"[\u001E]",
    			"completion":{
    				"field":"suggest",
    				"size":10,
    				"skip_duplicates":true
    			}
    		}
    	}
    }

```

or

```auto
    {
    	"suggest":{
    		"regex":{
    			"regex":"[\u001F]",
    			"completion":{
    				"field":"suggest",
    				"size":10,
    				"skip_duplicates":true
    			}
    		}
    	}
    }

```

What is this? Why does this happen?

---

<div class="post-metadata">

**Author:** ![spinscale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/spinscale/32/25011_2.png) [@spinscale](https://discuss.elastic.co/u/spinscale)\
**Post date:** [October 19, 2020, 11:29am UTC](https://discuss.elastic.co/t/term-text-cannot-contain-hole-character-u-001e-or-unit-separator-character-u-001f-this-character-is-reserved/252484/2 "2020-10-19T11:29:42Z")

</div>

The underlying logic of the completion field uses this character internally and thus it is considered reserved and will not be used for querying.

---

<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:** [November 16, 2020, 11:29am UTC](https://discuss.elastic.co/t/term-text-cannot-contain-hole-character-u-001e-or-unit-separator-character-u-001f-this-character-is-reserved/252484/3 "2020-11-16T11:29:57Z")

</div>

Closed on November 16, 2020, 11:29am UTC

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