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Hey all, what is wrong with this command: system2("echo", env = c(VAR = "Hello World"), args = c("$VAR")) I am a bit confused, as help("system2") writes about the env option: > character vector of name=value strings to set environment variables. Is this option buggy, or am I using it just wrong? Thanks for your help Henning

...bar What you need is something like (NB: single quotes!) pd$ VAR="foo" sh -c 'echo $VAR' foo So: > system2("sh", env = c("VAR='Hello World'"), args = c("-c 'echo $VAR'")) Hello World -pd > On 18 Mar 2019, at 17:28 , Henning Bredel <h.bredel at gmx.de> wrote: > > Hey all, > > what is wrong with this command: > > system2("echo", env = c(VAR = "Hello World"), args = c("$VAR")) > > I am a bit confused, as help("system2") writes about the env option: >...