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).

Hi everyone,

Yes; I have the same bug in PS 27.4.0,  f376f9.749 when using curves. In my case, I can modify curves without a problem, but when I want to reset it to ‘default’, the error appears.

In this case, the image is already 8bit and has a single background layer. For a new image, same behaviour, only when I click on ‘default’ to reset the curve.

I get the same error on 27.4, Mac Sequoia, RGB images, when trying to adjust a color channel. This was not present in the previous version.

Common question as well. You can reinstall your photoshop another way to rename your folder. old( new) . I will hope it’s helpful for you 
 

Thanks

Same error this morning, twice, while switching to the blue channel on curves (once on a smart layer and once through Image - Adjustments - Curves). Please, solve it. It’s umbelievable I’m paying an annual subriscption for this!!!

The exact same problem occurred this afternoon. I am NOT working on a smart object, but a simple jpeg. Photoshop froze and the only way I could get out of the program was by going to “task Master”. I restarted my machine, etc but the same thing occurs. Help!!!!!

全く同じエラーが出ます。トーンカーブ調整レイヤーを操作しているときに出ると、トーンカーブUI中からカーブが消えます。他のレイヤーを選択してから再度選択すると操作できるようになったりします。

こちらは、Mac（AppleSilicon / Tahoe 26.3）です。

※2026のトーンカーブUIはそもそも完成しているとは思えないので、2025までバージョンダウンしました。

​@jan_1377 just test on my system and i can reproduce the issue, using Photoshop version 27.4 on Windows 11

PS Version: 27.4.0

OS: Windows 11 (10.0.26200 Build 26200)

Steps to reproduce:
1. Open any image (tested with 16bit rgb image)
2. Add “curves” adjustment layer
3. Change curve randomly (eg. add some Contrast)
4. Switch to R, G or B Channel of the Curve
→ Crash

Note that the error message mentions smartobjects, yet it also occurs in images without any.
The proposed link talks about saving and opening files, but during the above steps there is no saving or opening going on.

When I don’t adjust the lightness curve but change to a Color Channel immediately, the behaviour is as expected. (no crash)
 

https://helpx.adobe.com/de/photoshop/desktop/troubleshoot/file-format-issues/resolve-program-error-while-saving-files.html?trackingid=C12Y2WS7&mv=in-product&mv2=ps