Can't seem to access defaultArnoldRenderOptions attributes

[DavidHenion]

I'm trying to run a 3rd party plugin and in the py file this line is failing:

render_device = cmds.getAttr("defaultArnoldRenderOptions.renderDevice")

In the script editor as mel commands I'm seeing this:

getAttr("defaultArnoldRenderOptions.renderDevice")

# Error: ValueError: file <maya console> line 1: No object matches name: defaultArnoldRenderOptions.renderDevice

listAttr("defaultArnoldRenderOptions")

# Error: ValueError: file <maya console> line 1: No object matches name: defaultArnoldRenderOptions

Arnold is set at the renderer and all works fine with a render, but not sure why these are failing.

Using Maya 2022.4

Any ideas?
Thank you

[DavidHenion · Accepted solution]

I was trying to run this on a new/empty scene - turns out Maya doesn't load some of the Arnold stuff until you open the render settings window (even though the renderer is set to Arnold.) If I open render settings, and then just close it - this works......