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  This page describes the Failed to load description of table columns DataLens
  On-premises error.
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# [DataLens On-premises] Failed to load description of table columns

`ERR.DS_API.COLUMN_SCHEMA_FAILED`

This error occurs when the table schema cannot be retrieved.


Make sure you can read the table schema using the standard methods for your source, and contact the Yandex Cloud [support](https://center.yandex.cloud/support). In your message, describe when the error occurs.