materials.itemByName() should return "null" but it doesn't

[JeromeBriot]

Hello,

import adsk
import traceback

def run(context):

    ui = None

    try:
        app = adsk.core.Application.get()
        ui = app.userInterface

        matLib = 'Fusion 360 Material Library'
        matName = 'ABS Plastic'

        # Get the library.
        lib = app.materialLibraries.itemByName(matLib)
        if not lib:
            ui.messageBox('"{}" not found'.format(matLib))
            return

        material = lib.materials.itemByName(matName)
        if not material:
            ui.messageBox('"{}" not found'.format(matName))
            return

        ui.messageBox('Succeed')

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

When mispeling the material library name (matLib variable), the script above works as expected.
app.materialLibraries.itemByName() returns "null" and the first message box appears.

When mispeling the material name (matName variable), an exception occurs and the except clause is executed.
materials.itemByName() should return "null" but it doesn't. That's what the documentation says: Materials.itemByName Method.

A workaround:

import adsk
import traceback

def run(context):

    ui = None

    try:
        app = adsk.core.Application.get()
        ui = app.userInterface

        matLib = 'Fusion 360 Material Library'
        matName = 'ABS Plastic'

        lib = app.materialLibraries.itemByName(matLib)
        if not lib:
            ui.messageBox('"{}" not found'.format(matLib))
            return

        try:
            material = lib.materials.itemByName(matName)
        except:
            ui.messageBox('"{}" not found'.format(matName))
            return

        ui.messageBox('Succeed')

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

[marshaltu]

Hello,

Thank you for reporting the issue to us. UP-36434 has been logged in our internal system to track it.

Thanks,

Marshal