RNetlogo and NetLogo 5.3 error

Question

I have been using RNetLogo with NetLogo 5.2.1 without troubles. Now I am using NetLogo 5.3 and I get this error:

> library(RNetLogo)
> nl.path <- \         


        

Answer 1

For NetLogo version 5.3.1 the following works if you want to start NetLogo up in headless mode from R on a Mac:

First, before loading the RNetLogo library, execute

Sys.setenv(NOAWT=1)

Then, execute the following:

library(RNetLogo)
setwd("/Applications/NetLogo 5.3.1/Java")
nl.path <- getwd()
NLStart(nl.path, gui = FALSE)

Answer 2

Change your line nl.path <- "/Applications/NetLogo 5.3/" to nl.path <- "/Applications/NetLogo 5.3/app" NetLogo has changed its directory structure; the netlogo jar file is now in an 'app' subdirectory.

You may also need to check the environment variables that you set up as part of the RNetLogo installation.