[Yandex Cloud documentation](../../../index.md) > [Yandex DataLens](../../index.md) > Troubleshooting > Unknown field found in formula

# [Yandex DataLens] 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.