Hello,

I ran into this issue where Labs simple baker sops dosent seem to work anymore from Houdini 20 onwards?

Every time I try to render or bake. This error message shows up.

Traceback (most recent call last):
File "labs::Sop/simple_baker::2.0/execute", line 1, in <module>
File "labs::Sop/simple_baker::2.0, PythonModule", line 6, in render
File "C:\PROGRA~1/SIDEEF~1/HOUDIN~1.547/houdini/python3.9libs\houpythonportion\ui.py", line 1137, in decorator
return func(*args, **kwargs)
File "C:\PROGRA~1/SIDEEF~1/HOUDIN~1.547/houdini/python3.9libs\hou.py", line 78643, in render
return _hou.RopNode_render(self, *args, **kwargs)
hou.OperationFailed: The attempted operation failed.
Error: Error rendering child: /obj/anti_aging_device_v2/simple_baker1/ropnet1/rop_games_baker/single_bake

Any idea why? Any suggested solution would be much appreciated.

Sorry, I don't have solution for this but just wanted to say that I'm getting the same error when trying to use Simple Baker with Houdini v20.5.332. I have tested it on both PC and Mac version and can't get it to work on neither.

I really hope we can get answer soon.
Im not a very technical person but thinking logically, I do wonder if its something to do with mantra??

I mean mantra is slowly being made redundent and Karma will be the main render engine, I wonder if this is the cause of the issue as Houdini no longer support mantra and these baker HDA uses mantra setup?

Just guessing but I still have no clue why is it not working.

I submitted a bug report and got this reply:

Hello,

The simple baker is being deprecated in favour of the maps baker.
Please try using the maps baker instead.

Hey Jukkam,

Thanks for the update. At least we know now.

Cheers!

Hey,

i just had the same problem, and with MapsBaker node as well.

My solution was to delete the Mantra renderer node inside the Out network. And add a Karma node.
I didn't change anything else and no more crashes.

Cheers.

Hi, wanted to chime in here as I've taken a look at both Simple Baker and Maps Baker, and they're both working with my relatively simple setup (baking the Rubber Toy onto a box with default settings). While Simple Baker does use Mantra for rendering, Maps Baker is purely COPs-based. I'm using 20.5.522.

For those with Simple Baker issues, that particular error is attempting to push the Render button on the ropnet1 SOP inside the network. I wonder if you run into the same error if you dive into the network and push the Render button manually. (Right click the HDA, select Allow Editing of Contents to unlock the HDA, double click to dive in and find the ropnet1 node).

Maps Baker is newer and since it uses a different rendering system, it might fit the bill.

Danicka
Hi, wanted to chime in here as I've taken a look at both Simple Baker and Maps Baker, and they're both working with my relatively simple setup (baking the Rubber Toy onto a box with default settings). While Simple Baker does use Mantra for rendering, Maps Baker is purely COPs-based. I'm using 20.5.522.

For those with Simple Baker issues, that particular error is attempting to push the Render button on the ropnet1 SOP inside the network. I wonder if you run into the same error if you dive into the network and push the Render button manually. (Right click the HDA, select Allow Editing of Contents to unlock the HDA, double click to dive in and find the ropnet1 node).

Maps Baker is newer and since it uses a different rendering system, it might fit the bill.

I did try your suggestion: allow editing of content on simple baker node > dive in > mannually hit the render button on the ropnet node. It does not work. I think like what the previous message mentioned. I think its due to Houdini fazing out mantra and there are some underlying mantra function no longer available which is breaking the node hard.

It's sad this node is not being updated or modernized. I really like the normal baking feature where you can actually bake a rounded edge from labs quick material node directly. I dont thik labs map baker can do that. Either that or I'm not familiar with this node and how to achieve what simple baker can. If anyone knows how to use labs map baker to bake rounder edge directly as normal map, would appreciate anyone sharing their knowledge.

I don't think it's Mantra being phased out. I'm able to use Simple Baker just fine in 20.5.522. I'm also able to render using a Mantra render node as I always have. I do think something strange is going on with your Mantra permissions, however I don't think it's anything to do with SideFX purposefully limiting its use.

Do you get an error message when pressing the render button or trying to render with a Mantra node? Do you have Mantra licenses available to you in your License Manager? What version of Houdini are you using?