topic Re: Error: [driver_png] defaultArnoldDriver@driver_png.RGBA: can't create file ".png": Could not open ".png" in Arnold for Maya Forum

Error: [driver_png] defaultArnoldDriver@driver_png.RGBA: can't create file ".png": Could not open ".png"

Anonymous — Thu, 02 Sep 2021 01:24:30 GMT

// Error: [driver_png] defaultArnoldDriver@driver_png.RGBA: can't create file ".png": Could not open ".png"

I'm getting this error constantly in my render. My file name have plain texts. I don't know why is this happening. Can anyone please help me with this.

Re: Error: [driver_png] defaultArnoldDriver@driver_png.RGBA: can't create file ".png": Could not open ".png"

Stephen.Blair — Thu, 02 Sep 2021 12:17:39 GMT

What is the output folder?

What does show at the top of the Render Settings > Common tab?

Re: Error: [driver_png] defaultArnoldDriver@driver_png.RGBA: can't create file ".png": Could not open ".png"

Anonymous — Thu, 02 Sep 2021 16:33:00 GMT

It shows the same as my project folder. I attached the screenshot of the window. I really hope we can fix this problem. I'm really struggling to understand what is the error about.

Re: Error: [driver_png] defaultArnoldDriver@driver_png.RGBA: can't create file ".png": Could not open ".png"

Stephen.Blair — Thu, 02 Sep 2021 16:58:45 GMT

Maya cannot create the file.

What else is logged in the script history?

Re: Error: [driver_png] defaultArnoldDriver@driver_png.RGBA: can't create file ".png": Could not open ".png"

Anonymous — Thu, 02 Sep 2021 17:43:45 GMT

I copied the fullscript history below

file -f -new;

// untitled //

commandPort -securityWarning -name commandportDefault;

onSetCurrentLayout "Maya Classic";

// Warning: file: /Users/adityasistu/Library/Preferences/Autodesk/maya/2020/prefs/filePathEditorRegistryPrefs.mel line 4: filePathEditor: Attribute 'aiImage.filename' is invalid or is not designated 'usedAsFilename'. //

// Warning: file: /Users/adityasistu/Library/Preferences/Autodesk/maya/2020/prefs/filePathEditorRegistryPrefs.mel line 5: filePathEditor: Attribute 'aiPhotometricLight.aiFilename' is invalid or is not designated 'usedAsFilename'. //

// Warning: file: /Users/adityasistu/Library/Preferences/Autodesk/maya/2020/prefs/filePathEditorRegistryPrefs.mel line 6: filePathEditor: Attribute 'aiStandIn.dso' is invalid or is not designated 'usedAsFilename'. //

// Warning: file: /Users/adityasistu/Library/Preferences/Autodesk/maya/2020/prefs/filePathEditorRegistryPrefs.mel line 7: filePathEditor: Attribute 'aiVolume.filename' is invalid or is not designated 'usedAsFilename'. //

// AbcExport v1.0 using Alembic 1.7.5 (built Feb 7 2018 13:51:52)

evalDeferred "shaderBallRendererMenuUpdate";

// Warning: line 1: filePathEditor: Attribute 'aiStandIn.dso' and label 'Standin' have been saved already. //

// Warning: line 1: filePathEditor: Attribute 'aiVolume.filename' and label 'VDB' have been saved already. //

// Warning: line 1: filePathEditor: Attribute 'aiImage.filename' and label 'Image' have been saved already. //

// Warning: line 1: filePathEditor: Attribute 'aiPhotometricLight.aiFilename' and label 'IES' have been saved already. //

import arnold

// Successfully imported python module 'arnold'

import mtoa

// Successfully imported python module 'mtoa'

import mtoa.cmds.registerArnoldRenderer;mtoa.cmds.registerArnoldRenderer.registerArnoldRenderer()

// Successfully registered renderer 'arnold'

updateRenderOverride;

// Warning: file: /Applications/Autodesk/maya2020/Maya.app/Contents/scripts/startup/autoLoadPlugin.mel line 35: Loading plug-in "mtoa" has resulted in changes to the scene that may need to be saved. //

// Loading Bifrost version 2.0.3.0

// Bifrost: Loading library: Amino, from: Autodesk.

// Bifrost: Loading library: AminoMayaTranslation, from: Autodesk.

// Bifrost: Loading library: bif, from: Autodesk.

// Bifrost: Loading library: bifrostObjectMayaTranslations, from: Autodesk.

// Bifrost: Loading library: geometries, from: Autodesk.

// Bifrost: Loading library: fluids, from: Autodesk.

// Bifrost: Loading library: particles, from: Autodesk.

// Bifrost: Loading library: file, from: Autodesk.

// Bifrost: Loading library: midgard, from: Autodesk.

// Bifrost: Loading library: nucleus, from: Autodesk.

// Bifrost: Loading library: simulation, from: Autodesk.

// AbcImport v1.0 using Alembic 1.7.5 (built Feb 7 2018 13:51:52)

updateRendererUI;

file -f -options "v=0;" -ignoreVersion -typ "mayaAscii" -o "/Users/adityasistu/Desktop/Bachelor of Media Arts/Second Year/Second Semester/Character performance/Assignment 1 Modelling character/Character design assignment 1 final/scenes/Character Design All UV's not Seperate.ma";addRecentFile("/Users/adityasistu/Desktop/Bachelor of Media Arts/Second Year/Second Semester/Character performance/Assignment 1 Modelling character/Character design assignment 1 final/scenes/Character Design All UV's not Seperate.ma", "mayaAscii");

updateRenderOverride;

// Warning: file: /Users/adityasistu/Desktop/Bachelor of Media Arts/Second Year/Second Semester/Character performance/Assignment 1 Modelling character/Character design assignment 1 final/scenes/Character Design All UV's not Seperate.ma line 71535: 'defaultColorMgtGlobals.cmEnabled' is already connected to 'aiImage1.colorManagementEnabled'. //

// Warning: file: /Users/adityasistu/Desktop/Bachelor of Media Arts/Second Year/Second Semester/Character performance/Assignment 1 Modelling character/Character design assignment 1 final/scenes/Character Design All UV's not Seperate.ma line 71536: 'defaultColorMgtGlobals.configFileEnabled' is already connected to 'aiImage1.colorManagementConfigFileEnabled'. //

// Warning: file: /Users/adityasistu/Desktop/Bachelor of Media Arts/Second Year/Second Semester/Character performance/Assignment 1 Modelling character/Character design assignment 1 final/scenes/Character Design All UV's not Seperate.ma line 71537: 'defaultColorMgtGlobals.configFilePath' is already connected to 'aiImage1.colorManagementConfigFilePath'. //

// Warning: file: /Users/adityasistu/Desktop/Bachelor of Media Arts/Second Year/Second Semester/Character performance/Assignment 1 Modelling character/Character design assignment 1 final/scenes/Character Design All UV's not Seperate.ma line 71538: 'defaultColorMgtGlobals.workingSpaceName' is already connected to 'aiImage1.workingSpace'. //

// Error: line 540: Invalid flag '-autoExpandAnimatedShapes' //

// File read in 1.5 seconds.

// Warning: file: /Applications/Autodesk/maya2020/Maya.app/Contents/scripts/startup/colorManagementUtilities.mel line 262: Color space "ACES" in node ":render_file1" is not defined in the selected transform collection. //

// Warning: OpenSubdiv gets different edge topology to Maya poly. //

// Warning: Fail to create OpenSubdiv TopologyRefiner. //

// Warning: The OpenSubdiv Catmull-Clark subdivision method cannot be applied to non-manifold geometry. Belt_GunShape will use "Maya Catmull-Clark" subdivision method for Smooth Mesh Preview. //

// Warning: OpenSubdiv gets different edge topology to Maya poly. //

// Warning: Fail to create OpenSubdiv TopologyRefiner. //

// Warning: The OpenSubdiv Catmull-Clark subdivision method cannot be applied to non-manifold geometry. Main_BodyShape will use "Maya Catmull-Clark" subdivision method for Smooth Mesh Preview. //

// Warning: Viewport textures have been optimized to fit within available GPU ram. 38 textures downscaled from original size. //

addOneTabToGlobalsWindow("arnold", "Common", "createArnoldRendererCommonGlobalsTab");

addOneTabToGlobalsWindow("arnold", "Arnold Renderer", "createArnoldRendererGlobalsTab");

addOneTabToGlobalsWindow("arnold", "System", "createArnoldRendererSystemTab");

addOneTabToGlobalsWindow("arnold", "AOVs", "createArnoldAOVTab");

addOneTabToGlobalsWindow("arnold", "Diagnostics", "createArnoldRendererDiagnosticsTab");

Re: Error: [driver_png] defaultArnoldDriver@driver_png.RGBA: can't create file ".png": Could not open ".png"

Stephen.Blair — Thu, 02 Sep 2021 17:46:15 GMT

I don't see the error in that output.
I think we'll see something before that error is printed.

Ok, let's try this: please get an Arnold log for a render.

Click Arnold > Open Arnold Render View, do this:

and then do a render in the Arnold Render View

Re: Error: [driver_png] defaultArnoldDriver@driver_png.RGBA: can't create file ".png": Could not open ".png"

Anonymous — Fri, 03 Sep 2021 01:40:58 GMT

I couldn't find the log icon in arnold renderview. I made log full in view tab. After rendering I got this script editor.

Sequence rendering completed

// Warning: /SET/BACKGROUND/environment_geo/environment_geoShape: indexed user-data in companion array has out-of-bounds indices in map11idxs! (should be less than 0) -- disabling user-data 'map11' //

// Error: [driver_exr] defaultArnoldDriver@driver_exr.RGBA: can't create file ".exr": Could not open ".exr" (File output failed.) //

Re: Error: [driver_png] defaultArnoldDriver@driver_png.RGBA: can't create file ".png": Could not open ".png"

Anonymous — Fri, 03 Sep 2021 01:42:58 GMT

I could see the model in renderview from the beginning. But I'm getting the same error while I'm doing the render sequence.

Sequence rendering completed

// Error: [driver_exr] defaultArnoldDriver@driver_exr.RGBA: can't create file ".exr": Could not open ".exr" (File output failed.) //

Re: Error: [driver_png] defaultArnoldDriver@driver_png.RGBA: can't create file ".png": Could not open ".png"

Stephen.Blair — Fri, 03 Sep 2021 18:46:00 GMT

I have to wonder if there's some non-ascii character, like a narrow space, in that path.

Try creating a test project in a folder that has no spaces.

Does that work?

Re: Error: [driver_png] defaultArnoldDriver@driver_png.RGBA: can't create file ".png": Could not open ".png"

m.oumoumad — Sun, 05 Sep 2021 20:17:24 GMT

We sometimes get this error in our scenes when we use multiple render drivers without paying attention to their naming. One solution that always worked in our case is this :

Go to AOVs tab in render settings, click "Delete All" this will delete all your AOVs, then go to File > Optimize Scene Size, make sure to check the box for "Rendering nodes", then click optimize. Now you can create your AOVs again and try to render this time.

If it still doesn't work, make sure there aren't extra render nodes or AOVs originating from a referenced scene file. In this case you'd have to do the same exercise in those referenced scene files without recreating the AOVs.

Re: Error: [driver_png] defaultArnoldDriver@driver_png.RGBA: can't create file ".png": Could not open ".png"

vivianas_caroc — Thu, 16 Mar 2023 06:02:02 GMT

Hello
I know it's late but maybe this can help someone else.
In my case all the error was because I created the camera with the command Ctrl + shift + c. With this one, although if the camera was created, when I was going to export in png as a sequence, I got this error.
The solution was to create a camera from Create --> Camera. After that I was able to export the sequence