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Bug

The Add Rasters To Mosaic Dataset tool (arcpy.management.AddRastersToMosaicDataset) fails for ECW files in ArcGIS Pro 3.4 compared to earlier versions and returns the error message, "8004818c: No new mosaic dataset item was added."

ArcGIS Pro
Bug ID Number BUG-000172732
SubmittedNovember 30, 2024
Last ModifiedAugust 14, 2025
Applies toArcGIS Pro
Version found3.4
Operating SystemWindows OS
Operating System Version11.0 64 bit
Version Fixed3.5/3.4.3
StatusFixed

Additional Information

This issue is addressed in ArcGIS Pro 3.5 and 3.4.3.

Steps to Reproduce

Bug ID: BUG-000172732

Software:

  • ArcGIS Pro

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