Thank you
Sorry I was unable to reply to you.
Actually, I am using landsatlinkr package available on Git Hub. I could manage to run until step 5 calibration. when I was running the last step of composite then I get memory problem. But I did this same process before without any problem. I am loading
library (landsatlinkr)
run_landsatlinkr
Then I follow the rest
I do not know whether this information work for you