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Bug

ERROR 999999 is returned when running the Append tool in ArcGIS Pro with the Target Dataset parameter set to an event layer.

ArcGIS Pro
Bug ID Number BUG-000171757
SubmittedOctober 25, 2024
Last ModifiedJune 12, 2025
Applies toArcGIS Pro
Version found3.3.2
Operating SystemWindows OS
Operating System Version10.0 64 Bit
Version Fixed3.5
StatusFixed

Additional Information

This issue is fixed in ArcGIS Pro 3.5.

Steps to Reproduce

Bug ID: BUG-000171757

Software:

  • ArcGIS Pro

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