P: PS 27.4 & 27.5 (beta) Changing channels in Curves crashes PS with error: Could not update smart object files because of a program error (f376f9.749).

Curves adjustment: error f376f9.749 in Photoshop Version 27.3.1

The error said in Spanish: "No se ha podido crear una capa a partir de la selección porque ha habido un error de programa (f376f9.74)."

ENG: "A layer could not be created from the selection because there was a program error (f376f9.74)."

Then you can see that If I try to switch the file window the “gausian blur” filter effect is bugged in the process as well.

I hope this helps to the development team.

Try to open the file as a smart Object in Photoshop. That helped me work around this problem.

Any news on this? I’m having 20+ crashes. Clean install and setting delete doesn’t help.

​@Rolf Södergren the issue has been reported here

I created a Curves layer and opened the Properties panel and selected the Blue channel. After this, Ps didn´t respond at all. 

Bug Report: Program Error (f376f9.749) in Curves Adjustment Layer

Environment:

• OS: Windows 11 (latest build)

• Photoshop Version: 2026 (current release)

• Hardware: NVIDIA RTX 4000 Ada Generation, 128GB RAM (72GB allocated to PS)

• Document: 16-bit ProPhoto RGB, Fine Art photography

Steps to Reproduce:

1. Create a Curves Adjustment Layer on a standard raster layer.

2. Input several manual points in the RGB channel (e.g., Input 28 -> Output 24, Input 224 -> Output 229).

3. Immediately switch to the Blue channel via the dropdown menu in the Properties panel.

4. Result: Photoshop returns "Could not update smart object files because of a program error (f376f9.749)" and locks the UI for that layer.

Note: The error occurs even on non-smart object layers.

Observed Workaround: The UI becomes responsive again only after adding a second Curves Adjustment Layer on top of the stack. This seems to force a cache refresh/redraw of the Layer Stack, allowing the first layer to function normally again.

Suspected Cause: A race condition or cache buffer overflow in the UXP/Adobe Spaces engine during histogram recalculation when switching between composite and individual color channels on high-end GPU setups.

I have the same issue on RTX 4000 Ada. My workaround: add a second Curves layer, then the first one starts working across all channels

현 최신버전 27.4 에서 곡선 보정중 오류가 뜨고 포토샵이 완전 정지하는 심각한 버그가 있습니다.

작업하는 파일이나 레이어에 상관없이 두가지 이상의 색역을 보정하고 선택하는 순간 포토샵이 정지합니다.

불과 몇시간 전 까진 아무런 문제가 없었으나 갑자기 이 현상이 생긴 이후로는 일관적으로 버그가 발생합니다.

It looks like that after the latest Camera Raw update, the problem is solved, at least for me. Curves just work fine now, I no longer get error messages and Photoshop doesn't freeze anymore.