[Rcpp-devel] Creating a Rcpp package : Visual C++ Library error

Valentin Mansion valentin.mansion at laposte.net
Wed Jul 18 06:13:50 CEST 2012

As I was going through the Rcpp Quick Reference Guide, I just found a
solution to my problem :
In the .R file of my package, in the .Call function, there was no
argument telling my function needed an input variable... I added this,
rebuilt/installed the package, and now it works.
The new .R file :

sum2cpp <- function (x) {.Call( "sum2cpp", x, PACKAGE = "starFMcpp" ) }

Sorry for the two unnecessary mails I sent !


2012/7/18 Valentin Mansion <valentin.mansion at laposte.net>:
> Hi everyone,
> I have an issue when creating a package using Rcpp, on a Windows7,
> 32bits computer. I haven’t found anything on the net or help pdfs that
> looks like my error, so maybe you can help me.
> I have used the Rcpp.package.skeleton function with the
> example_code=TRUE argument, in order to see how Rcpp functions have to
> be written when creating a package. When I create the package
> containing the “Rcpp_hello_world” function, apart from a few error
> messages due to poor documentation, it works: the function returns
> good results (a list with “1” “2”,”foo” ”bar”).
> However, when I try to put a function that I created in the package, I
> have a Microsoft Visual C++ Library error message. The function works
> fine when I run it using the inline package (it sums the elements of a
> vector, and ignores the NAs if any), so it must be something with the
> files that I added in the package. These files are:
> -a sum2cpp.h file in the “src” folder,
> #ifndef _starFMcpp_SUM2CPP_H
> #define _starFMcpp_SUM2CPP_H
> #include <Rcpp.h>
> RcppExport SEXP sum2cpp(SEXP x) ;
> #endif
> -a sum2cpp.cpp file, in the “src” folder,
> #include "sum2cpp.h"
> SEXP sum2cpp(SEXP x) {
>     using namespace Rcpp ;
>     Rcpp::NumericVector vect(x);
>     int sizeVect = vect.size();
>     double sum2(0.);
>     for (int i = 0; i < sizeVect; ++i) {
>       if ( is_na(vect)[i]==false ) {    sum2=sum2+vect[i];    }
>     }
>   return(Rcpp::wrap(sum2));
> }
> -a sum2cpp.R file in the R folder.
> sum2cpp <- function (x) {.Call( "sum2cpp", PACKAGE = "starFMcpp" )}
> After I do R CMD build, R CMD check and R CMD INSTALL, I am able to
> load my package in R and run rcpp_hello_world (that I left in the
> package), but when I try to run sum2cpp(1:2) I have an error message
> contained in a window named “Microsoft Visual C++ Library”:
> “This application has requested the Runtime to terminate in an unusual
> way. Please contact the application’s support team for more
> information.”
> And the R GUI freezes, thus forcing me to kill the R GUI process.
> What is this Visual C++ thing? Some problem with finding a tool? My
> path is PATH=C:\R\Rtools\bin;C:\R\Rtools\gcc-4.6.3\bin;C:\R\R-2.15.1\bin;
> Some problem with wrong writing of the .h, .cpp or .R files? This is
> the first time that I create a package, so I may have made beginner’s
> mistakes...
> If you need any other information, just ask me.
> Regards,
> Valentin

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