installation problem

[gniloo]

when I want to install CIL toolbox with this code (conda create --name cil -c conda-forge -c intel -c ccpi cil=23.0.1 astra-toolbox tigre ccpi-regulariser tomophantom "ipywidgets<8")
this gives this error ( A directory already exists at the target location 'C:\Users\LENOVO\anaconda3\envs\cil'
but it is not a conda environment.)
would you please help me to solve this problem.

[paskino]

well, it looks like you already have a directory named cil in your anaconda installation. The easiest solution is to change the environment name

conda create --name cil_latest -c conda-forge -c intel -c ccpi cil=23.0.1 astra-toolbox tigre ccpi-regulariser tomophantom "ipywidgets<8"

The other option is to permanently delete it, C:\Users\LENOVO\anaconda3\envs\cil. Although I would say that this is rather safe, before doing so, make sure it does not contain files you'll regret deleting.