Rstudio does not start "Unable to determine real path of R script" due to previous error during compilation of R

Question

I am using Fedora 32, I have R (3.5.1 ) within conda. I also compiled R 4.0.0 from source but since I was having another problem with Rstudio I removed this version trying to solve these issues. (With 4.0.0 I couldn't install packages because I got an 'C++11 standard requested but CXX11 is not defined' error, I made the mistake of using --with-x=no during that compiling)

Now I tried to either compile a new version (4.0.1) or get R through yum, but every time I try to reinstall Rstudio I get this error:

Unable to determine real path of R script /home/andrespara/R-4.0.0/bin/R (system error 2 (Folder doesn'exist*))

I removed ~/.config/rstudio ~/.local/share/rstudio ~/.rstudio/ every time I removed/reinstalled Rstudio. I also searched for help in the rstudio community forums. I also

I compiled 4.0.1 with this line (deactivating conda before this avoided the X11 error that I had before)

./configure \                                                                                                                                                           
    --prefix=/opt/R/${R_VERSION} \
    --enable-memory-profiling \
    --enable-R-shlib \
    --with-blas \
    --with-lapack

I added symbolic links following these instructions https://docs.rstudio.com/resources/install-r-source/

sudo ln -s /opt/R/${R_VERSION}/bin/R /usr/local/bin/R
sudo ln -s /opt/R/${R_VERSION}/bin/Rscript /usr/local/bin/Rscript

R 4.0.1 is now correctly installed, I even used it today and installed some package the only missing link is with Rstudio and its installation that doesn't recognize it.

My question is how to either jump to another version of R working with Rstudio and get rid of that message when Rstudio starts.

• I should add can't even start Rstudio because it still asks for the 'broken version' even when I tried to reinstall it several times.

Answer 1

I managed to solve this thanks to a colleague who found a workaround.

First running RSTUDIO_WHICH_R=$(which R) and then rstudio in the console bypassed the first error.

conda deactivate  
RSTUDIO_WHICH_R=$(which R)                                                                                                                                                            
rstudio 

Then knowing the launcher was the error and thanks to this answer https://askubuntu.com/a/112259/265501 I went to /usr/share/applications and edited the line pointing to the useless binary with the correct one in the rstudio.desktop file found there.