So, for the first time I am trying to do multiple integration using TF3 for 3 variables. Here’s below what I wrote in my code which is showing error when compiled. It is showing that it can’t call Wrapped function. I don’t know how to do triple integration in ROOT and where is my error in this code. Any help in this regard would be highly appreciated. Thank you.

```
TF3 *sigma_1 = new TF3("sigma_1", integrand_sigma , 0, 100,0,100,-1,1,2);
Sigma->FixParameter(0, q);
Sigma->FixParameter(1, T);
ROOT::Math::WrappedMultiTF1 wf1(Sigma);
ROOT::Math::AdaptiveIntegratorMultiDim ig;
ig.SetFunction(wf1);
double xmin[] = {0,0};
double xmax[] = {100,100};
double sigma_num = ig.Integral(xmin, xmax);
cout<<sigma_num<<endl;
```