r - Message error 'C:/Program' not found with Rcpp

Question

I'm running a 64-bit Windows 7 platform.

I have added to my installed programs/libraries:

• Rtools

• R (software)

• Rcpp (R package)

• inline (R package)

I tried out a snippet found here

## now with Rcpp and C++
library(inline)
# and de?ne our version in C++
src <- "int n = as<int>(ns);
double x = as<double>(xs);
for (int i=0; i<n; i++) x=1/(1+x);
return wrap(x); "
l <- cxxfunction(signature(ns="integer", xs="numeric"),
body=src, plugin="Rcpp")

But that doesn't work (That is not a surprise to be honest as I even didn't specified eg the location of Rtools). I get the following error message:

Error in system(cmd, intern = !verbose) : 'C:/Program' not found

I'm not sure of what that means. And, I have been stuck there for a couple of hours now. Can anyone help me a bit, please?

Answer 1

The R on Windows FAQ says in Question 2.2:

If you want to be able to build packages from sources, we recommend that you choose an installation path not containing spaces.

Also see Question 2.16 of that FAQ. I am fairly certain that we also make that point repeatedly in the Rcpp documentation.

Now, if you forgo the inline package, and try working in RStudio, then you might get around this (as there are more efforts to protect the $PATH with spaces).

But in short, I would reinstall R into, say C:RR-$version as it is the only way to get default behaviour on all examples. And we have lots of them. It's worth reinstalling.