Hi everyone.
I’d successfuly installed chap-core on my local Ubuntu machine.
Still, when I ran the following chap evaluate command in its terminal, it returned an error:
chap evaluate --model-name D:/chap_training/minimalist_example_r/MLproject --dataset-name ISIMIP_dengue_harmonized --dataset-c
ountry brazil --report-filename report.pdf
Error message returned:
FileNotFoundError: [Errno 2] No such file or directory: ‘/D:/chap_training/minimalist_example_r/MLproject’
Any guidance to fix this would be truly appreciated
2- Also, I tried to run the chap evaluate command above in the terminal of my Rstudio and I received the error message : chap command not found
Why did this failled?
Then, what renv is for?
3-
where are the right places to run the chap command “chap evaluate …” ?
Hi! In terms of the file placement when running the command in the terminal it should instead be D:/chap_training/minimalist_example_r/, so just without the MLproject at the end. This was unclear in the tutorial.
2 - For the terminal in Rstudio it appears to be unable to find the global chap installation. There might be ways around this, or you can alternatively repeat the installations steps in the terminal in Rstudio. Note that this would give you two separate Chap installations, which could cause confusion later. My advice is to edit the files in Rstudio and to use the chap commands in a separate terminal outside Rstudio.
In the given example renv is not strictly relevant as no other libraries are used. It is only included so the framework for packages is in place if you choose to build on the example code. In general it is a good tool for handling package versioning in R, similar to uv in Python.
3 - The chap evaluate command should work from any terminal, but apparently not from Rstudio, and I suppose there could be other exceptions. So the terminal where you got the error based on the filename should work fine.
Hi
Thank you so much for your responses and guidance.
following your recommendation about the file path, I rewrote the code like follows:
chap evaluate --model-name D:\chap_training\minimalist_example_r\ –dataset-name ISIMIP_dengue_harmonized --dataset-country brazil --report-filename report.pdf
when I ran this in the terminal of my Ubuntu, I received now the following message:
Thanks in advance for any guidance to fix this.
P.S:
Please note that I’m running the code from the root directory in the terminal of my Ubuntu
Hi, it looks like you’re specifing a windows path. Are you on a windows computer using WSL? If so you should not use the windows path I think, but the mounted linux paht, something like this:
chap evaluate --model-name /mnt/d/chap_training/minimalist_example_r/ --dataset-name ISIMIP_dengue_harmonized --dataset-country brazil --report-filename report.pdf
Or just naviagate to the folder where the model is and use --model-name ./
Hi
Thank you for your response.
I’m on windows computer using WSL.
I corrected the path and the previous error message no longer appears.
But the one appearing now is below:
Visiting the suggested website didn’t help me solve that issue.
I also checked the MLproject file and found the line " renv_env:renv.lock " but I’m unsure what to change.
Great, then we are one step further. The error message you’re seeing is probably because you have an old chap-core version. It can sometimes be a bit tricky to upgrade the chap version if you have an old one installed. Did you run this command uv tool install chap-core --python 3.13 ? Could you also run chap --version, it should be 1.1.4 or higher
Hi @Knut_Dagestad_Rand
Thank you for your responses and your time.
You are right: the version of my chap is lower than 1.1.4
I just installed the 1.1.4 version of chap.
The issue I’m experiencing now is “Rscript not found” :
Ah yes, it seems like R is not installed in your wsl. The documentation was not clear enough about this. I think running apt install r-base should fix it. You might also need to do Rscript -e "install.packages('renv') afterwards
Hi
Installing R in my wsl has fixed the “Rscript not found” issue; thank you once again.
Now, the error I’m experiencing after running the chap evaluate … is below:
shutil.Error: [(‘minimalist_example_r/.Rprofile’, ‘runs/minimalist_example_r/2026-01-23_20-42-28_bfd2cb1e/.Rprofile’, “[Errno 1] Operation not permitted: ‘runs/minimalist_example_r/2026-01-23_20-42-28_bfd2cb1e/.Rprofile’”), (‘minimalist_example_r/input/futureClimateData.csv’, ‘runs/minimalist_example_r/2026-01-23_20-42-28_bfd2cb1e/input/futureClimateData.csv’, “[Errno 1] Operation not permitted: ‘runs/minimalist_example_r/2026-01-23_20-42-28_bfd2cb1e/input/futureClimateData.csv’”), (‘minimalist_example_r/input/trainData.csv’, ‘runs/minimalist_example_r/2026-01-23_20-42-28_bfd2cb1e/input/trainData.csv’, “[Errno 1] Operation not permitted: ‘runs/minimalist_example_r/2026-01-23_20-42-28_bfd2cb1e/input/trainData.csv’”), (<DirEntry ‘input’>, ‘runs/minimalist_example_r/2026-01-23_20-42-28_bfd2cb1e/input’, “[Errno 1] Operation not permitted: ‘runs/minimalist_example_r/2026-01-23_20-42-28_bfd2cb1e/input’”), (‘minimalist_example_r/isolated_run.r’, ‘runs/minimalist_example_r/2026-01-23_20-42-28_bfd2cb1e/isolated_run.r’,
Please find below further details on the screeshot below:
Hi, this might be due to the files being in the windows mount on the wsl. Can you try following this guide and see if that helps? If not, we are looking into solutions for running chap-core not through wsl.
Running chap-core with minimalist_example_r in WSL
The “Operation not permitted” error occurs because files are on the Windows filesystem (/mnt/c/…). WSL has trouble copying file metadata between Windows and Linux filesystems.
Solution: Use WSL’s native Linux filesystem
Step 1: Open WSL terminal
Open your WSL terminal (Ubuntu or whichever distribution you installed).
Hi - I am struggling to run my chap evaluate command smoothly. I get a bunch of codes back in response but I can’t understand what I am missing (see below).
Hi!
I think this model requires docker to install. If you want you can install docker (Docker Desktop) and then run the model. But it is ok to not be able to run this model, there are many models that doesnt require docker
I’ll update the documentation with more detailed instructions for the WSL setup
