# Invalid\_type\_name\_exception error
**URL:** https://discuss.elastic.co/t/invalid-type-name-exception-error/45974
**Category:** Kibana
**Tags:** elastic-stack-graph
**Created:** [March 31, 2016, 5:25pm UTC](https://discuss.elastic.co/t/invalid-type-name-exception-error/45974 "2016-03-31T17:25:59Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@voipoclay](https://discuss.elastic.co/u/voipoclay)
#### Post date: [March 31, 2016, 5:25pm UTC](https://discuss.elastic.co/t/invalid-type-name-exception-error/45974/1 "2016-03-31T17:25:59Z")
I seem to be getting an error when accessing my index. I will mention it has multiple types within a single index. I also want to say im using the latest kibana with the graph plugin.
```
T 2016/03/31 17:21:46.266180 y.y.y.y:47934 -> x.x.x.x:9200 [AP]
POST /messages-2016.03.30/_graph/explore HTTP/1.1.
Host: zzzzzzz:9200.
Content-Length: 273.
Connection: keep-alive.
.
{"query":{"query_string":{"default_field":"_all","query":""}},"controls":{"use_significance":true,"sample_size":2000,"timeout":5000},"connections":{"vertices":[{"field":"to.number","size":5,"min_doc_count":3}]},"vertices":[{"field":"to.number","size":5,"min_doc_count":3}]}
T 2016/03/31 17:21:46.313677 x.x.x.x:9200 -> y.y.y.y:47934 [AP]
HTTP/1.1 400 Bad Request.
Content-Type: application/json; charset=UTF-8.
Content-Length: 233.
.
{"error":{"root_cause":[{"type":"invalid_type_name_exception","reason":"Document mapping type name can't start with '_'"}],"type":"invalid_type_name_exception","reason":"Document mapping type name can't start with '_'"},"status":400}
```
---
### Author:  [@Mark\_Harwood](https://discuss.elastic.co/u/Mark_Harwood)
#### Post date: [March 31, 2016, 8:06pm UTC](https://discuss.elastic.co/t/invalid-type-name-exception-error/45974/2 "2016-03-31T20:06:55Z")
This looks like the error you get if you haven't installed the graph plugin on your elasticsearch node.
The call to the \_graph api is interpreted As an attempt to create a new doc type.
Cheers
Mark
---
### Author:  [@voipoclay](https://discuss.elastic.co/u/voipoclay)
#### Post date: [March 31, 2016, 8:46pm UTC](https://discuss.elastic.co/t/invalid-type-name-exception-error/45974/3 "2016-03-31T20:46:33Z")
Hello,
Thanks for that looks like a missed one of the nodes and now its good. Now I get the following error. I have a basic license I use for marvel and it looks like its good until january 2017 when I hit `/_license` uri. I was hoping to just check out the 30 day trial.
```
{
"error": {
"root_cause": [
{
"type": "security_exception",
"reason": "current license is non-compliant for [graph]",
"license.expired.feature": "graph"
}
],
"type": "security_exception",
"reason": "current license is non-compliant for [graph]",
"license.expired.feature": "graph"
},
"status": 401
}
```
---
### Author:  [@Mark\_Harwood](https://discuss.elastic.co/u/Mark_Harwood)
#### Post date: [April 1, 2016, 12:06am UTC](https://discuss.elastic.co/t/invalid-type-name-exception-error/45974/4 "2016-04-01T00:06:04Z")
There is already another topic in this forum that discusses the license requirements. See [Authorization Required](https://discuss.elastic.co/t/authorization-required/45849/5)
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 1:44pm UTC](https://discuss.elastic.co/t/invalid-type-name-exception-error/45974/5 "2017-07-06T13:44:14Z")