What causes Fabric Copy Activity Error 20552?

A command behavior value was appended as a query parameter to a preview API request URL. A command behavior value was included as a parameter in a GetSchema API request URL. Custom or legacy pipeline configurations passing unsupported behavior flags to the Copy Activity

How do I fix Fabric Copy Activity Error 20552?

Step 1: Identify the pipeline activity that triggered error 20552 and open its settings in the Fabric Data Factory authoring UI.. Step 2: Inspect the API request URL or activity payload for any 'commandBehavior' or equivalent behavior parameter being passed.. Step 3: Remove the command behavior parameter from the preview or GetSchema API request URL entirely.. Step 4: Save and republish the pipeline, then re-trigger the Copy Activity to confirm the error is resolved.. Step 5: If the behavior was added programmatically via a REST call or SDK, update the calling code to omit unsupported behavior parameters.

Medium severityconfigurationMicrosoft Fabric →

Power BI Refresh Error:
Fabric Copy Activity Error 20552

What does this error mean?

The specified command behavior parameter is not supported by the Copy Activity API. This error occurs when an unsupported behavior is passed as a parameter to a preview or GetSchema API request URL.

Common causes

1A command behavior value was appended as a query parameter to a preview API request URL
2A command behavior value was included as a parameter in a GetSchema API request URL
3Custom or legacy pipeline configurations passing unsupported behavior flags to the Copy Activity

How to fix it

1Step 1: Identify the pipeline activity that triggered error 20552 and open its settings in the Fabric Data Factory authoring UI.
2Step 2: Inspect the API request URL or activity payload for any 'commandBehavior' or equivalent behavior parameter being passed.
3Step 3: Remove the command behavior parameter from the preview or GetSchema API request URL entirely.
4Step 4: Save and republish the pipeline, then re-trigger the Copy Activity to confirm the error is resolved.
5Step 5: If the behavior was added programmatically via a REST call or SDK, update the calling code to omit unsupported behavior parameters.

Frequently asked questions

Why does this error only appear when calling preview or GetSchema?

The Copy Activity runtime restricts which command behaviors are valid for specific API operations. Preview and GetSchema endpoints have a defined, limited parameter contract, and passing unsupported behaviors outside that contract triggers error 20552.

Can I still use command behaviors in my pipeline at all?

Command behaviors may be supported in full copy execution contexts, but not in preview or GetSchema API requests. Review Microsoft's supported parameters list for the specific endpoint you are calling and remove any unsupported values.