The IDW, Spline, and Trend tools result in a syntax error when selecting specific field names for the z-value field.
Last Published: September 28, 2015ArcGIS for Desktop
Bug ID Number
September 15, 2015
March 14, 2023
ArcGIS for Desktop
The issue is a duplicate of an existing issue. See the issue's Additional Information section for details. Customers associated with the duplicate issue are automatically attached to the open issue.
This appears to affect all the Spatial Analyst tools that take feature input, viz., Density and Interpolation tools.
Rename the field with an added underscore to the end, or to a new name, and run the tool again.