Replace Errors in All Columns in Power Query M

Replaces error values with null across every column in a table, without listing columns individually.

Error HandlingIntermediateerrorsall columnsbulknull

Power Query M code

let
    Source = YourTable,
    ColumnNames = Table.ColumnNames(Source),
    ReplacedErrors = Table.ReplaceErrorValues(Source, List.Transform(ColumnNames, each {_, null}))
in
    ReplacedErrors

Notes

This adapts automatically if columns are added or removed, unlike listing each column by name.

Requirements

How to use this snippet

  1. In Power BI Desktop, choose Transform data to open Power Query, then open the Advanced Editor on a query (or start from a blank query).
  2. Paste the snippet and replace the placeholder names (tables, columns, file paths) with your own. Check the requirements above first.
  3. Run it through the Power Query M Formatter to tidy the layout.

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