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I try to use R.Net in an asp.net Razor App with docker support. The docker image is Debian 10, R is installed in the image under the standard path /usr/lib/R . When executing

REngine.SetEnvironmentVariables(rHome:"/usr/lib/R"); // or any other path including none
REngine engine = REngine.GetInstance();
I obtain the error R home directory is not defined. If I open a shell into my container and start R, R.home() returns /usr/lib/R. So it looks as if R in the container has a R home directory set, but r.net isn't recognizing it? Any ideas what I could try to fix this?
You most likely invoke R the wrong way. Use /usr/bin/R which is a frontend which sets R_HOME for further use by the other components.
edd@rob:~$ file /usr/bin/R
/usr/bin/R: Bourne-Again shell script, ASCII text executable
edd@rob:~$ grep ^R_HOME /usr/bin/R 
R_HOME_DIR=/usr/lib/R
R_HOME="${R_HOME_DIR}"
edd@rob:~$ 
                Thanks for your quick reply. It seemed indeed, that I was starting R differently from the console in the docker container and from asp.net. Now I set the environmental variable in my dockerfile ENV R_HOME=/usr/lib/R and R.NET seems to work.
– Qrt
                Apr 20, 2020 at 11:41
        
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