Load files into stack not working with CR2 files

Hi all,

I can't use the « Load files into stack » option with Canon raw files. I don't have the problem if I use the technique with JPG files. If I try it, it loads the first file as a layer then when processing the second, I get the error message « Load Layers can not merge Smart Object documents. They will be skipped. ». I get the exact same behavior if I'm in Bridge and try Tools --> Photoshop --> Load files into Photoshop Layers.

I can open each file individually in Photoshop without any problem. I tried different raw files but I come across the same problem. I tried it with PS 2020 & PS 2021.

I'm using a Mac on Big Sur.

Anyone had that problem ?

Thanks