[Bioc-devel] Building of a package using Rcpp in R version 5.1

[Martin Morgan]

Sounds like an Rcpp question and should be asked on the Rcpp mailing list

   http://lists.r-forge.r-project.org/mailman/listinfo/rcpp-devel

Sorry for the run-around!

Martin

On 09/05/2018 02:17 PM, André Luiz Molan wrote:
> Hi,
> 
> I'm trying to create an R package using Rcpp. I am using the "Build" option
> from RStudio and roxygen2 package. My package is build with no error
> messages and normally loaded. However, when I call a function from the new
> package, I have the following message:
> 
> *Error in .Call(<pointer: (nil)>, val1) :
>    NULL value passed as symbol address
> Called from: MakeSquare(x = val)*
> 
> 
> This is just a simple function I have created for testing:
> 
> 
> cppFunction('double MakeSquare(double x){
>          double result = 0;
>          result = x*x;
>          return result;
> 
> }')
> 
> 
> The Rcpp function I have created above is called by another function:
> 
> CalcSquare <- function(val1,val2){
>      valResult <- (val1 + val2)/2
>      valSquare <- MakeSquare(x = valResult)
>      return(valSquare)
> }
> 
> 
> I have imported all the necessary packages, including Rcpp. I have looked
> at different discussion forums by I did not find any solution.
> 
> I sincerely hope you could help me.
> 
> Best regards,
> 
> André
> 
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> 
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