Module not found in box.path

[bombusfragrans]

I am in a RNotebook and set the box.path in a code chunk with...

options(box.path = here::here("modules", "R"))

The RNotebook is located in and run from a project sub-folder: project_folder/experiments/template

If I try to load a module (Data_Import.R) which is located in project_folder/modules/R with e.g. ...

box::use(R/Data_Import)

I get the following error:

Error in box::use(R/Data_Import) :
unable to load module "R/Data_Import"; not found in 
"/mnt/<...>/rstudio/rworkspace/projects/<project name>/modules/R", 
"/mnt/<...>/rstudio/R/x86_64-pc-linux-gnu-library/4.2/box/mod", 
"/mnt/<...>/rstudio/rworkspace/projects/<project name>/experiments/template"
(inside "find_in_path(spec, mod_search_path(caller))")
# I shortened the path a bit in-between `<...>`
# I also replaced the project folder name with `<project name>`

I also tried box::use(modules/R/Data_Import) with same results. However, if I run this command from the console it works.

I guess I miss something obvious.

Any help or hints in the right direction would be highly appreciated.

Many thanks in advance!

[klmr]

When you are setting your module search path to path/to/modules/R and loading modules via box::use(R/Data_Import), this means that the module Data_Import is searched in the path path/to/modules/R/R/. Note the nested R/R/ path!

Therefore, I suspect that your issue would be fixed if you adjust the module search path by removing the trailing "R".

In addition, I generally recommend to not use here::here() with ‘box’, because here::here() only works in very specific situations but fails in others. By contrast, box::file() always gives you the correct location of the currently running code.

In your particular case, this means running the following code inside your R Notebook:

options(box.path = box::file("../../modules"))

In contrast to here::here(), this is setting the module search path relative to the notebook, rather than relative to the project root.

[bombusfragrans]

That was quick! Many thanks! I will give it a try ...

[bombusfragrans]

Most excellent! That worked flawlessly. Thanks also for the recommendation as well.