My Admin has carefully performed the two steps mentioned by Rick_SAS, that is. Start the SAS server with the -RLANG option; according to: https://go.documentation.sas.com/?cdcId=pgmsascdc&cdcVersion=9.4_3.3&docsetId=imlug&docsetTarget=imlug_r_sect003.htm&locale=en Define the R_HOME environment variable to point to the path of your R installation directory; according to: https://www.sas.com/content/dam/SAS/support/en/sas-global-forum-proceedings/2019/3556-2019.pdf However, although the "proc options option=rlang value; run;" shows that RLANG is ENABLE; the SAS code with (only) the R script indicated below keeps giving me the following error message.   ERROR: SAS could not initialize the R language interface. ERROR: The R shared library could not be loaded: /opt/R/3.6.3/lib/libR.so     proc iml; submit / r; ------------------ R script ---------------- x<-y+5; endsubmit; quit;   Do you guys have any thought on the source(s) of this problem? ... View more