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Problem: When running the ZonalStats function at the Grid prompt, 'Fatal Error' occurs

Description

** Fixed at ArcGIS 8.2 **

This error occurs when running the ZonalStats function at the Grid prompt:

"Fatal Error"

Cause

This is a known problem with large input grid datasets.

Solution or Workaround

This is issue has been resolved in ArcGIS Version 8.2.

In previous versions:

Run ZonalStats to calculate only one statistic to save memory space:

Code:
Grid: output = zonalstats(zonegrid, griddataset, mean)