What causes ParquetColumnNotFound?

The column name in the ADF dataset schema is misspelled or has a different casing than the column name in the Parquet file. The Parquet file schema changed after the ADF dataset was configured. The Parquet file was generated by a different process that omits certain columns under certain conditions

How do I fix ParquetColumnNotFound?

Refresh the ADF dataset schema by clicking "Import schema" to re-read the Parquet file structure.. Update the column mapping in the copy activity to match the actual column names in the Parquet file.. Use schema drift in ADF data flows to handle Parquet files with variable column sets.

Medium severitydata source

Power BI Refresh Error:
ParquetColumnNotFound

What does this error mean?

A column referenced in the ADF copy activity mapping does not exist in the source Parquet file.

Common causes

1The column name in the ADF dataset schema is misspelled or has a different casing than the column name in the Parquet file
2The Parquet file schema changed after the ADF dataset was configured
3The Parquet file was generated by a different process that omits certain columns under certain conditions

How to fix it

1Refresh the ADF dataset schema by clicking "Import schema" to re-read the Parquet file structure.
2Update the column mapping in the copy activity to match the actual column names in the Parquet file.
3Use schema drift in ADF data flows to handle Parquet files with variable column sets.

Frequently asked questions

Does this error affect all pipeline runs or just the current one?

Depends on the root cause. A persistent misconfiguration fails every run; a transient issue may resolve on retry. Check the run history.

Can this error appear in Azure Data Factory and Microsoft Fabric pipelines?

Yes — the same connector errors appear in both ADF and Fabric Data Factory pipelines.

How do I see the full error detail for an ADF pipeline failure?

In ADF Monitor, click the failed run, then the failed activity. The detail pane shows the error code, message, and sub-error codes.

Will downstream Power BI datasets be affected when an ADF pipeline fails?

Yes — a dataset refreshing after the pipeline will use stale data or fail if the target table was cleared. The Power BI refresh may succeed while serving wrong data.

Official documentation: https://learn.microsoft.com/en-us/azure/data-factory/connector-troubleshoot-parquet