What causes Fabric Copy Activity Error 20745?

The skipErrorFile configuration includes an invalid file name skip option that is incompatible with the current copy activity mode. Copy activity is not configured for direct binary copy with a folder source, which is required for this skip behavior. The skip setting was inherited from a pipeline template or duplicated activity without verifying compatibility with the target connector and copy mode

How do I fix Fabric Copy Activity Error 20745?

Step 1: Open the copy activity settings in your Fabric Data Factory pipeline and inspect the skipErrorFile JSON block.. Step 2: Identify and remove the invalid file name skip property from the skipErrorFile configuration.. Step 3: Review the Microsoft Fabric Data Factory documentation to confirm which skipErrorFile options are valid for your connector and copy mode combination.. Step 4: If skipping files with invalid names is required, verify the copy activity is using direct binary copy with a folder source and that your connector supports this option.. Step 5: Save the pipeline and trigger a new run to confirm the error no longer occurs.

Medium severityconfigurationMicrosoft Fabric →

Power BI Refresh Error:
Fabric Copy Activity Error 20745

What does this error mean?

The skip invalid file name option is not supported in the current copy activity configuration. This setting has specific prerequisites around copy mode or connector support that are not currently met.

Common causes

1The skipErrorFile configuration includes an invalid file name skip option that is incompatible with the current copy activity mode
2Copy activity is not configured for direct binary copy with a folder source, which is required for this skip behavior
3The skip setting was inherited from a pipeline template or duplicated activity without verifying compatibility with the target connector and copy mode

How to fix it

1Step 1: Open the copy activity settings in your Fabric Data Factory pipeline and inspect the skipErrorFile JSON block.
2Step 2: Identify and remove the invalid file name skip property from the skipErrorFile configuration.
3Step 3: Review the Microsoft Fabric Data Factory documentation to confirm which skipErrorFile options are valid for your connector and copy mode combination.
4Step 4: If skipping files with invalid names is required, verify the copy activity is using direct binary copy with a folder source and that your connector supports this option.
5Step 5: Save the pipeline and trigger a new run to confirm the error no longer occurs.

Frequently asked questions

What types of file name issues would this skip setting normally handle?

This setting is designed to allow copy activities to skip files whose names contain characters or patterns that are invalid for the destination storage system, allowing the rest of the copy to proceed rather than failing entirely.

Why do so many skipErrorFile options share similar restrictions?

Most skipErrorFile options are only meaningful in the context of copying multiple files from a folder in binary mode, because only in that scenario can the activity selectively skip individual problematic files and continue with the rest. Single-file or transformed copies do not support partial skipping.