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Power BI Refresh Error:
UnsupportedCompressionTypeWhenDisableChunking

What does this error mean?

The compression type configured for the HTTP or SFTP source is not supported when chunking is disabled — certain compression types require chunked transfer.

Common causes

  • 1The copy activity source uses a compression type (e.g., ZipDeflate) that is only supported with chunked transfer enabled
  • 2Chunking was explicitly disabled in the copy activity settings while an incompatible compression type was retained

How to fix it

  1. 1Enable chunked transfer in the HTTP or SFTP source settings of the copy activity.
  2. 2Alternatively, remove the compression setting or switch to a compression type that is supported without chunking (e.g., GZip).
  3. 3Review the ADF documentation for the specific list of compression types that require chunked transfer.

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-ftp-sftp-http

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