Houdini 19 Arnold not rendering materials?

[robertojauregui]

I'm beginner Houdini artist and so I may not understand what is the preferred workflow, but I'm currently unable to render arnold materials in Houdini 19. I've downloaded and installed the latest HtoA 6.0.1.0 and confirmed by going to About HtoA that it is installed.

I tried File>Open... and File>OpenRecentFiles, the latter of which I use most often. I have to try double-clicking the file to open Houdini 19.

Arnold works as expected in 18.5, so am I missing something in Houdini 19? I am not using Solaris workflow yet. Luckily I have done much look dev in the file but when I go to the mat context and click on my arnold material builder nodes, no parameters show up. When I create a materialX standard surface, parameters show up as expected. But still doesn't render my geo and instead shows up pink.

Creating a simple scene with a sphere, sky dome and using an arnold material builder in a matnet within obj context, I can render with no pink look, but the materials parameters do not show up as expected.

Any ideas or simple instructions of what I should do to get Arnold working in the latest Houdini? Links to documents, tutorials are cool if I'm just not understanding what is proper workflow. The below window pops up when i open my files scene. No pop up shows when I first open houdini19.

UDATE: Deleting all pre-existing arnold material builder nodes seemed to resolve the pink render issue but the parameters still do not show up when selecting the arnold material. Also, assigning a materialX standard surface shader only renders grey similar to an arnold material. Even when changing the materialx base color nothing happens

UPDATE 2: For some reason it's working today as expected. I'm not sure what happened but maybe a restart helped? This doesn't seem to be an issue anymore.

[Stephen.Blair]

Issue resolved itself:

UPDATE 2: For some reason it's working today as expected. I'm not sure what happened but maybe a restart helped? This doesn't seem to be an issue anymore.

[flecoq75]

I m using Houdini 19.5.403 with htoa-6.1.3.3_rdb15014_houdini-19.5.403_windows.

Bascial scene with a standard_surface shader (base color: blue)

-> Rendering: pink object, no shader applied