Error Code: -40 with PNGs

I'm getting the following error message:

"The GPU failed to perform image processing because of an error."

"Error Code: -40."

I'm seeing this after adding a lot of very high resolution PNG files into the media pool, but most are not yet on the timeline. I can dismiss it and all seems to work, but it pops up fairly frequently.

Any ideas what the issue might be? Over half of my RAM is still available.

Running Resolve Studio 17.3.2 Build 8

It's not about RAM, but VRAM. How much do you have and what's the resolution of your PNGs?

My GPU has 8GB and Task Manager shows its use fluctuating between 2 and 6GB being used. Although it does seem like that error code often pops up when it swings up towards 6GB, so perhaps it's actually hitting 8 and failing.

The PNGs range from about 1,000 to 2,200 pixels high, but they're extremely wide, anywhere from 12,000 to over 30,000 pixels. Although they're monochrome and all less than 1 MB in size. When I had only one of them in the media pool and only one in the timeline (via Fusion), I had no issues at all. Once I put about 60 in the media pool I started getting the errors, and trying to put a second one into the timeline (also via Fusion) either crashes Resolve, or just doesn't display the image (and everything suddenly runs extremely slowly).

So I suppose it's trying to load all 60 of these into the VRAM in some memory-intense sort of way? Is there a way to tell it not to do that, only loading the images actually in the timeline? I guess if I have to I can work on each one as its own project, though it wouldn't be very convenient.

(Now on 17.4.2. Same issue.)

If that's an Nvidia GPU, it seems 'normal'.

Actually it's an AMD RX 580 (and Ryzen 5600X CPU).

At this point I'm going to try removing all these files from the media pool and just add one at a time until I have an issue, then start a new project and continue the process.

Any ideas if there's a way to tell Resolve to not load (or whatever it's doing with these PNGs that aren't even in the timeline yet) specific files in the media pool?

Oh, it actually seems like I've hit Resolve's old 16k file limit. I thought that had been lifted, but apparently you still can't use files that exceed 15,360 pixels wide or 8,640 tall. But now they do display in the media pool (before their thumbnails wouldn't render at all).

Also, check that it's in RGB space and not CMYK

Yeah, looks like you can't get any image bigger than 16384 wide or tall in a timeline. 16384x16384 works, but (for example) 16386 x 16384, or anything higher, just shows a black screen. At least those are the numbers I found when outputting from a Fusion composition; I didn't test with media files.

You could do it all in Fusion though, accessing the images via Loader nodes - which bypasses the Media Pool entirely, and also avoids still image caching problems caused by using MediaIn nodes for still images in Fusion. A secondary issue of using MediaIn is that it will bring the images in as float32 - even when they could be loaded as int8. A Loader will use the depth found in the file, and given your images are monochrome, int8 is probably fine. An int8 image uses four times less RAM and VRAM than a float32 one does, which could get pretty significant when your images are 2000 x 30000.

So, I'd suggest making a Fusion Composition that loads the image(s) via one or more Loader nodes, then scales / crops the images in whatever way desired down to timeline resolution, then outputs the result to the timeline via MediaOut. Eg maybe you have a UHD or HD timeline on which you want to display your supersized images, after scaling them to timeline res.

I would suggest not using stills bigger than 8K x 8K. Any bigger and you're going to run out of steam. I don't know what the actual size limit is -- it's possible with a powerful enough system, 12K x 12K might work.

Be warned that TIFFs, PNGs, and JPGs are all a bit dodgy if you ever need to do Media Management. My guess is their lack of timecode doesn't help.