---
title: "error with R directory when starting calc"
url: "https://openforis.support/questions/1606/error-with-r-directory-when-starting-calc"
tags: ["calc"]
status: "answered"
score: 0
answer_count: 2
asked: "2018-01-29T10:49:08"
last_activity: "2018-02-02T12:34:57"
source: "Open Foris Support - Q&A Forum"
license: "Copyright Open Foris, 2026. Some rights reserved under creative commons license."
---

# error with R directory when starting calc

Asked by kristoferd on 2018-01-29

Hello,
When we start Calc it does not go to the home screen but instead it says "R executable directory must contain valid R executable file". When we put the directory in line it does not accept it. What are we doing wrong?
Calc Version: 2.1
R Version: 3.4.3
Thanks


## Answer (score 0, by Mino Togna on 2018-01-29)

Link: https://openforis.support/questions/1606/error-with-r-directory-when-starting-calc/1607

Did you put a valid directory? Note it should be the full path of where r.exe is located.

Also, make sure you install R in a folder without space. 

E.g. C:\opt\R\R.3.3.1\bin

Thank you

Mino


## Answer (score 0, by Lauri (OF) on 2018-02-02)

Link: https://openforis.support/questions/1606/error-with-r-directory-when-starting-calc/1612

Hi Folks,

this is the case that happens nowadays almost every time with Calc and R because files and folders under C:\Program files are Read-only by default (by Windows). In this case, R (and RStudio) puts all packages under C:\Users\USERNAME\...  and Calc can not find them. Calc assumes that R packages are under Library folder in the same path where R is installed.

There are multiple solutions to fix this, until Calc programmer fixes this. 

Solution 1) Right click C:\Program files\R and take a tag out from Read-only. Then reinstall all packages in R/Rstudio so that the target in the Library folder under that path.

Solution 2) Remove Read-only tag as above. Copy all installed R packages from C:\Users\USERNAME\... to  C:\Program files\R\R_VERSION\Library\   and start using Calc

Solution 3) Reinstall R under C:\Users\Public\.. and reinstall all R packages. This is not a Read-only folder by default.

I strongly wish that this issue can be solved in Calc without these tricks by its users.

Cheers