# Report creation error - \[\_opendistro\], must not start with '\_'

**URL:** <https://forum.opensearch.org/t/report-creation-error-opendistro-must-not-start-with/10197>\
**Category:** Reporting Plugin\
**Created:** [July 6, 2022, 12:46pm UTC](https://forum.opensearch.org/t/report-creation-error-opendistro-must-not-start-with/10197 "2022-07-06T12:46:38Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Mian](https://avatars.discourse-cdn.com/v4/letter/m/46a35a/32.png) [@Mian](https://forum.opensearch.org/u/Mian)\
**Post date:** [July 6, 2022, 12:46pm UTC](https://forum.opensearch.org/t/report-creation-error-opendistro-must-not-start-with/10197/1 "2022-07-06T12:46:38Z")

</div>

Hi, we cannot create a report

Error message in browser:  
“There was an error generating this report.”

Kibana exception in log:

```auto
{"statusCode":400,"responseTime":30,"contentLength":9},"message":"POST /api/reporting/generateReport?timezone=Europe%2FBerlin 400 30ms - 9.0B"}
{"type":"log","@timestamp":"2022-07-06T09:14:55Z","tags":["error","plugins","opendistroReportsKibana"],"pid":1018,"message":"{ **Error: [invalid_index_name_exception] Invalid index name [_opendistro], must not start with '_'.**, with { index_uuid=\"_na_\" & index=\"_opendistro\" }\n at respond (/usr/share/kibana/node_modules/elasticsearch/src/lib/transport.js:349:15)\n at checkRespForFailure (/usr/share/kibana/node_modules/elasticsearch/src/lib/transport.js:306:7)\n at HttpConnector.<anonymous> (/usr/share/kibana/node_modules/elasticsearch/src/lib/connectors/http.js:173:7)\n at IncomingMessage.wrapper (/usr/share/kibana/node_modules/lodash/lodash.js:4949:19)\n at IncomingMessage.emit (events.js:203:15)\n at endReadableNT (_stream_readable.js:1145:12)\n at process._tickCallback (internal/process/next_tick.js:63:19)\n status: 400,\n displayName: 'BadRequest',\n message:\n '[invalid_index_name_exception] Invalid index name [_opendistro], must not start with \\'_\\'., with { index_uuid=\"_na_\" & index=\"_opendistro\" }',\n path: '/_opendistro/_reports/on_demand',\n query: {},\n body:\n { error:\n { root_cause: [Array],\n type: 'invalid_index_name_exception',\n reason:\n 'Invalid index name [_opendistro], must not start with \\'_\\'.',\n     

```

opendistro version 1.13.2  
elasticsearch version: 7.10.2

---

<div class="post-metadata">

**Author:** ![Mian](https://avatars.discourse-cdn.com/v4/letter/m/46a35a/32.png) [@Mian](https://forum.opensearch.org/u/Mian)\
**Post date:** [July 7, 2022, 12:54pm UTC](https://forum.opensearch.org/t/report-creation-error-opendistro-must-not-start-with/10197/2 "2022-07-07T12:54:50Z")

</div>

solution:  
opendistro report plugin for kibana  
needs  
opendistro report schedule plugin installed on elasticsearch