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Bug

In ArcMap, when running arcpy.Dissolve_management in Integrated Development Environment (IDLE), the output has multiple dissolved records.

Last Published: July 19, 2018 ArcGIS for Desktop
Bug ID Number BUG-000109840
SubmittedNovember 29, 2017
Last ModifiedFebruary 18, 2025
Applies toArcGIS for Desktop
Version found10.5
Operating SystemWindows OS
StatusWill Not Be Addressed

Additional Information

The amount of memory available is critical for dissolve. With more memory dissolve is able to create larger features (get down to fewer output features). ArcMap.exe is compiled with a special (Large Address Aware) switch that allows it to allocate 3 GB of memory. python.exe (IDLE) is not compiled with this special switch so can only allocate the normal 2 GB of memory for a 32 bit app.

Workaround

Use the Dissolve tool within ArcMap, or if using tool in script, use ArcGIS Pro (2.0.1) ArcPy.

Steps to Reproduce

Bug ID: BUG-000109840

Software:

  • ArcGIS for Desktop

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