2. We have precompiled the tools from the toolbox in a module called ArcHydroTools so that you do not have to redo the import each time which takes a long time... Then in your script you will need to add:import ArcHydroToolsand call the tools with: ArcHydroTools.AssignHydroID(tmpPolyFC, "OVERWRITE_YES")Christine Dartiguenave Esri Water Resources Team
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