Cannot add an extrudeFeature to activeSelections

[chevyhou0117]

I got a "Invalid Argument Entity" Error on:

ui.activeSelections.add(occurrence.component.features.extrudeFeatures.item(0)) 

But it can successfully run if the code is:

extrude_feature = selectionInput.selection(0).entity #I selected the same extrudeFeature

ui.activeSelections.add(extrude_feature)

It seems like the selected feature and the original feature is different... Is there anyone know the reason? Thank you very much!

[kandennti · Accepted solution]

Hi @chevyhou0117 -San.

This is a Proxy issue when dealing with component elements.

# Fusion360API Python script

import traceback
import adsk.core as core
import adsk.fusion as fusion

def run(context):
    ui: core.UserInterface = None
    try:
        app: core.Application = core.Application.get()
        ui = app.userInterface
        des: fusion.Design = app.activeProduct
        root: fusion.Component = des.rootComponent

        occurrence: fusion.Occurrence = root.allOccurrences[0]

        extrudeFeature: fusion.ExtrudeFeature = occurrence.component.features.extrudeFeatures.item(0)

        # error
        # ui.activeSelections.add(extrudeFeature)

        # ok
        extrudeFeature_proxy: fusion.ExtrudeFeature = extrudeFeature.createForAssemblyContext(
            occurrence
        )
        ui.activeSelections.add(extrudeFeature_proxy)

    except:
        if ui:
            ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))

See "Proxies" in this document.

https://help.autodesk.com/view/fusion360/ENU/?guid=GUID-88A4DB43-CFDD-4CFF-B124-7EE67915A07A 

[chevyhou0117]

Thank you so much, @kandennti -San.