This issue has existed for over a month and affects all Windows executables. It’s due to missing Windows libraries on Github. What’s the cause? I don’t know (Windows update? Github update?, etc.)
I’m absolutely not qualified to resolve this. It would “simply” be a matter of showing me what to do (where? what? how?..).
However, the compiled versions work without any problems, as do the Linux versions (appimage).
Jacques
Hello @fasteddie
Just copied and pasted right now, from an old version of RawTherapee, the 2 missing .dll
Thanks a lot for your tip 
At present, this one is still not working (Windows 11)
libngtcp2_crypto_ossl-0.dll
It is indeed present in the dev folder but it is “not linked” to the .exe I suppose…
Thanks for sharing @nosle . I finally spent some time trying your approach on several dozen images and must say that it’s far easier and quicker than the the way I was doing it.
Hello
I just merge dev into cam16slope branch
The Pull Request is up to date and so are the executable
Text cam16slope
Jacques
Hello all
After numerous checks by Copilot, various testers, and myself during the writing of the documentation for Hugo, I believe the system is reliable.
I propose, if no one objects, that we merge next week. This will allow us to broaden the pool of people who will test it.
Jacques
Hello @jdc
Do you know whether the bug, on Windows, preventing the builds to start, has been fixed?
I have tried them, both on Windows 10 and 11 but, due to some .dll not working, the process failed to work.
Anyway, thanks a lot indeed for your work!
I am truly grateful for your improvements
@Silvio_Grosso
I’m not at all an expert on this sort of thing like @Lawrence37
But I’ll tell you what just happened to me.
While trying to create documentation for Rawpedia (Hugo), I can’t see the preview of the changes made under Windows or Linux. I followed the process to the letter (requiring git, hugo, pnpm, etc.). Nothing works; perhaps it’s a BIOS incompatibility or due to dual booting?
However, to be sure, I performed a Linux update (Ubuntu 24.04) using the command prompt with ‘sudo apt update’ and ‘sudo apt upgrade’. I do this regularly (every 2 to 3 days), and everything updates (system, software, libraries, etc.) in a few seconds or minutes. And of course, as nothing is simple, the Linux installations of Hugo and pnpm depend on the distribution (Ubuntu, Fedora, Mint, etc.). I checked the versions of Hugo and pnpm, and everything is OK.
I wanted to do the same thing on Windows. Windows system updates are decided by Microsoft (the last one, around 25H2, took 2 hours and 15 minutes) and don’t concern Msys2/Mingw64 (which is used for RT…).
For Msys2/Mingw64, you have to open the terminal and run ‘pacman -Syu’. This takes 3 to 5 minutes depending on the connection speed. I do this update roughly every two months.
I did it the day before yesterday, November 5th. Everything compiled without a problem, so the RT compilation mechanism with CMake works. But when I ran ‘./rawtherapee’ in the terminal, I got the message “DLLs missing”. The problem is that these DLLs are present in Mingw64/bin…but apparently not recognized, and they are used to run under Windows.
So there are two possible solutions:
Therefore, development under Windows becomes impossible.
Luckily, I have a dual boot system (it’s easy to set up) and at startup I choose between Windows and Ubuntu.
From now on, I do everything under Linux. A lot of habits to change; it’s neither better nor worse, but you have to change:
That’s where we are, I hope it won’t take several months… Otherwise, switch to Linux, it’s more reliable, unless you use specific software (Computer-Aided Design, certain games, etc.).
Jacques
My RT Monstrosity edition:
After the default installation of the 5.12 release (C:\Program Files\RawTherapee) - it did not support my camera model yet - I have extracted a pre-dev build (captur-noise) on top of it, and got a fine working RawTherapee with recently added valuable stuff.