[R] setting up a genoud run

Hello - and sorry for a possibly stupid question, I'm just starting to learn rgenoud. I am defining a function with 5 parameters (p1, p2, p3, p4a, and p4b) and then want to optimize it using genoud. But I am doing something wrong. Before genoud is even able to run it says: Error in p2 + 1.2 :

Re: [R] setting up a genoud run

As a follow up to my original question, I got it to run by re-specifying my function a bit like this - I made the vector of 5 predictors the argument of my function: f1 = function(predictors) { # predictors: p1,p2,p3,p4b,p4a y = 2 + 1.5*predictors[1] +