Arnold Renderer, cant find drivers

[Anonymous]

In Maya 2017, i have Arnold renderer plug-in activated  and it works when the scene first opens. But once i start making complex scenes with multiple object and lights i get the error

Cant find drivers aos or drivers don't exist.

Did i delete something out of the hierarchy, or can it only handle simple scenes.

[Anonymous]

In Maya 2017, i have Arnold renderer plug-in activated  and it works when the scene first opens. But once i start making complex scenes with multiple object and lights i get the error

Cant find drivers aos or drivers don't exist.

Did i delete something out of the hierarchy, or can it only handle simple scenes.

[Stephen.Blair]

Hi

Can we see the exact error messages from the script history?

[Stephen.Blair]

Hi

Can we see the exact error messages from the script history?

[Anonymous]

the error code is

# Error: line 1: AttributeError: file C:\Program Files\Autodesk\Maya2017\Python\lib\site-packages\pymel\core\nodetypes.py line 409: nt.Unknown(u'defaultArnoldRenderOptions') has no attribute or method named 'drivers' #

[Anonymous]

the error code is

# Error: line 1: AttributeError: file C:\Program Files\Autodesk\Maya2017\Python\lib\site-packages\pymel\core\nodetypes.py line 409: nt.Unknown(u'defaultArnoldRenderOptions') has no attribute or method named 'drivers' #

[Stephen.Blair · Accepted solution]

Hi

That's a scene-specific problem with some nodes.

Do you have these four nodes in the scene?

- defaultArnoldRenderOptions
- defaultArnoldDriver
- defaultArnoldFilter
- defaultArnoldDisplayDriver

You can check in the Outliner, just clear Display > DAG Objects Only

If so, then try this:

- close the Render Settings dialog
- delete those four nodes
- save the scene (with a new name)
- restart Maya
- load the scene you just saved

[Stephen.Blair · Accepted solution]

Hi

That's a scene-specific problem with some nodes.

Do you have these four nodes in the scene?

- defaultArnoldRenderOptions
- defaultArnoldDriver
- defaultArnoldFilter
- defaultArnoldDisplayDriver

You can check in the Outliner, just clear Display > DAG Objects Only

If so, then try this:

- close the Render Settings dialog
- delete those four nodes
- save the scene (with a new name)
- restart Maya
- load the scene you just saved

[Anonymous]

Thank you!

[Anonymous]

Thank you!

[Anonymous]

Hi,

I am having the same issue with Maya 2018. The message is: # Error: AttributeError: file D:\PROGRAMOS\Maya2018\Python\lib\site-packages\pymel\core\nodetypes.py line 414: nt.Unknown(u'defaultArnoldRenderOptions') has no attribute or method named 'drivers'

I am a new user. Could you kindly explain: "You can check in the Outliner, just clear Display > DAG Objects Only " in more detail?

Can't find the option "DAG Objects Only" as specified.

[Anonymous]

Hi,

I am having the same issue with Maya 2018. The message is: # Error: AttributeError: file D:\PROGRAMOS\Maya2018\Python\lib\site-packages\pymel\core\nodetypes.py line 414: nt.Unknown(u'defaultArnoldRenderOptions') has no attribute or method named 'drivers'

I am a new user. Could you kindly explain: "You can check in the Outliner, just clear Display > DAG Objects Only " in more detail?

Can't find the option "DAG Objects Only" as specified.

[Stephen.Blair]

---

@Anonymous wrote:

Hi,

I am having the same issue with Maya 2018. The message is: # Error: AttributeError: file D:\PROGRAMOS\Maya2018\Python\lib\site-packages\pymel\core\nodetypes.py line 414: nt.Unknown(u'defaultArnoldRenderOptions') has no attribute or method named 'drivers'

I am a new user. Could you kindly explain: "You can check in the Outliner, just clear Display > DAG Objects Only " in more detail?

Can't find the option "DAG Objects Only" as specified.

---

[Stephen.Blair]

---

@Anonymous wrote:

Hi,

I am having the same issue with Maya 2018. The message is: # Error: AttributeError: file D:\PROGRAMOS\Maya2018\Python\lib\site-packages\pymel\core\nodetypes.py line 414: nt.Unknown(u'defaultArnoldRenderOptions') has no attribute or method named 'drivers'

I am a new user. Could you kindly explain: "You can check in the Outliner, just clear Display > DAG Objects Only " in more detail?

Can't find the option "DAG Objects Only" as specified.

---

[Anonymous]

Thank your. Found now. It does not help. Still the same message is popping up.

[Anonymous]

Thank your. Found now. It does not help. Still the same message is popping up.

[Anonymous]

Ok, I think I might know what's causing the issue. I have Maya installed on D disc and it might be looking for Arnold on disc C. Could that be the case? How do I show it the right path? 

[Anonymous]

Ok, I think I might know what's causing the issue. I have Maya installed on D disc and it might be looking for Arnold on disc C. Could that be the case? How do I show it the right path? 

[Anonymous]

I do not have those in the scene. How can I add them?

[Anonymous]

I do not have those in the scene. How can I add them?

[Anonymous]

none of what was mentioned was not in my outliner and i still can't render with Arnold.

[Anonymous]

none of what was mentioned was not in my outliner and i still can't render with Arnold.

[Anonymous]

I've tried everything!
I've set only the 3 required AOV's. 

I've set merge AOV's on all the driver.
I've deleted all driver, saved scene and restarted Maya.
I've changed the file path to be on my C drive.
I've tried saving out as multi exr and normal exr files.

Why is this so fidly? Why is nothing simple with Arnold? Please help.

The latest error i got is this
# Error: ValueError: file C:\Program Files\Autodesk\Arnold\maya2020\scripts\mtoa\denoise.py line 280: invalid literal for int() with base 10: '' #

[Anonymous]

I've tried everything!
I've set only the 3 required AOV's. 

I've set merge AOV's on all the driver.
I've deleted all driver, saved scene and restarted Maya.
I've changed the file path to be on my C drive.
I've tried saving out as multi exr and normal exr files.

Why is this so fidly? Why is nothing simple with Arnold? Please help.

The latest error i got is this
# Error: ValueError: file C:\Program Files\Autodesk\Arnold\maya2020\scripts\mtoa\denoise.py line 280: invalid literal for int() with base 10: '' #

[Anonymous]

UPDATE

After everything, I finally got it to work. No one ever told me you needed to render as a batch or sequence. Even the video from where I got the original idea to use Noise. Told me to merge AOV's and everything but not to render in sequence smh.The arnold main page was actually useful for once and says '(saving from the Arnold RenderView window will not work)'

Also the video told me to manually add N, Z, and diffuse albedo. Which is incorrect. Just check the 'output denoiser AOV'S' In Arnold Denoiser tab and that creates them for you..... go figure. 

Anyway, even then It didn't work. I read on another forum about an error (among many errors) about the file location being an issue. Not just that, you cant use particular symbols. So i just named my file 'b' and saved the exr in my project folder. Annnnnd it worked when I denoised from there. 

Extremely long winded and It should be made a lot lot simpler. Anyway hope this helps someone. 

[Anonymous]

UPDATE

After everything, I finally got it to work. No one ever told me you needed to render as a batch or sequence. Even the video from where I got the original idea to use Noise. Told me to merge AOV's and everything but not to render in sequence smh.The arnold main page was actually useful for once and says '(saving from the Arnold RenderView window will not work)'

Also the video told me to manually add N, Z, and diffuse albedo. Which is incorrect. Just check the 'output denoiser AOV'S' In Arnold Denoiser tab and that creates them for you..... go figure. 

Anyway, even then It didn't work. I read on another forum about an error (among many errors) about the file location being an issue. Not just that, you cant use particular symbols. So i just named my file 'b' and saved the exr in my project folder. Annnnnd it worked when I denoised from there. 

Extremely long winded and It should be made a lot lot simpler. Anyway hope this helps someone.