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canonical: en/troubleshooting/errors/ERR-DS_API-FORMULA-UNKNOWN_FIELD_IN_FORMULA.html
title: DataLens On-premises error ERR.DS_API.FORMULA.UNKNOWN_FIELD_IN_FORMULA
description: >-
  This page describes the Unknown field found in formula DataLens On-premises
  error.
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# [DataLens On-premises] Unknown field found in formula

`ERR.DS_API.FORMULA.UNKNOWN_FIELD_IN_FORMULA`

This error occurs when the formula refers to a non-existent field.

The field was probably deleted from the chart or dataset.

To fix the error, double-check and correct the formulas.