laptop and a wrench

Bug

In ArcGIS Pro, the Flow Direction tool fails to execute and returns the error message, "ERROR 999999: Something unexpected caused the tool to fail" when the Flow Direction Type parameter is set to 'MFD'.

Last Published: November 21, 2022 ArcGIS Pro
Bug ID Number BUG-000144915
SubmittedDecember 2, 2021
Last ModifiedJune 14, 2025
Applies toArcGIS Pro
Version found2.9
Operating SystemWindows OS
Operating System Version10.0 64 Bit
Version Fixed3.1
StatusFixed

Additional Information

This issue is addressed in ArcGIS Pro 3.1.

Steps to Reproduce

Bug ID: BUG-000144915

Software:

  • ArcGIS Pro

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