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Bug

Modifying field mapping is not allowed in the Append tool.

Last Published: August 4, 2022 ArcGIS Pro
Bug ID Number BUG-000151141
SubmittedJuly 28, 2022
Last ModifiedMay 27, 2025
Applies toArcGIS Pro
Version foundN/A
Operating SystemWindows OS
Operating System VersionN/A
StatusAs Designed

Additional Information

In ArcGIS Pro 3.0, when the 'Use the field map to reconcile field differences' option is selected in the Append tool, users are unable to modify the existing schema of the target dataset in the Field Map controls. This is as-designed. Prior to ArcGIS Pro 3.0, the Field Map controls gave the incorrect impression that fields could be added or removed and modified in the Append tool, but when the tool was actually run, these changes were not reflected in the updated target dataset. This is because the schema of the target dataset is locked. Users are still able to specify input sources to map, to target fields to reconcile field differences present in the existing schema. In ArcMap, the controls to add or remove fields in the Field Map controls for the Append tool are disabled for this same reason. The changes to the ArcGIS Pro 3.0's Append tool Field Map controls were implemented to present an accurate representation of what can be accomplished in the tool. Documentation for ArcGIS Pro 3.0 states that "Because the data of the input datasets is written to an existing target dataset that has a predefined schema (field definitions), the Field Map parameter does not allow fields to be added or removed from the target dataset." For more information, refer to: https://pro.arcgis.com/en/pro-app/latest/tool-reference/data-management/append.htm. This is not a change from earlier versions of ArcGIS Pro. For example, refer to archived ArcGIS Pro 2.6 documentation in https://pro.arcgis.com/en/pro-app/2.6/tool-reference/data-management/append.htm. The documentation will be reviewed further to ensure all tool capabilities are properly communicated. The Merge tool is recommended for combining multiple input datasets with the ability to modify existing fields.

Steps to Reproduce

Bug ID: BUG-000151141

Software:

  • ArcGIS Pro

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