CODEWITHSUNDEEP
c#.netrvisual-studiorclr
TVidvei
TVidvei

Reputation: 3

How to debug c# code called from R by rClr?

I'm trying to debug C# methods that are called from R by means of rClr. In the VS-project I have set the the start action property to start Rscript.exe with the R-script as commandline parameter. (Similar to what you would do e.g. to debug c# functions called from Excel using ExcelDNA.) The R-script runs as expected, but execution doesn't stop at the breakpoints. So I'm not able to do any debugging from Visual Studio.

What am I doing wrong?

Here is a minimal example:

C#-code in VS-project RLib1 - Calculates.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RLib1
{
    public class Calculate {
        public static double Sum(double x1, double x2) {
            return x1 + x2;
        }
    }
}

Properties in RLib1.csproj
Start external program: c:\R\R-3.3.2\bin\Rscript.exe
Command line arguments: c:\VSProjects\RLib1\TestRLib1.R

R-script in TestRLib1.R

library(rClr)
clrLoadAssembly('C:/VSProjects/RLib1/RLib1/bin/Debug/RLib1.dll')
clrGetTypesInAssembly("RLib1")
clrCallStatic("RLib1.Calculate","Sum",2,5)

Upvotes: 0

Views: 119

Answers (1)

j-m
j-m

Reputation: 1554

You may want to use the "Attach to process" feature of visual studio as it is a bit more transparent in terms of debugging behavior; see https://github.com/jmp75/rClr/issues/32 for details.

Upvotes: 0

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