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canonical: en/troubleshooting/errors/ERR-DS_API-DB-CHYT-TABLE_HAS_NO_SCHEMA.html
title: DataLens On-premises error ERR.DS_API.DB.CHYT.TABLE_HAS_NO_SCHEMA
description: >-
  This page describes the YT table has no schema. Only schematized tables are
  supported DataLens On-premises error.
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# [DataLens On-premises] YT table has no schema. Only schematized tables are supported

`ERR.DS_API.DB.CHYT.TABLE_HAS_NO_SCHEMA`

The YTsaurus table in use has no schema. You cannot use such tables in DataLens. Recreate the table with a schema (specify the data types).