RNetlogo / NLstart doesn't do anything

[rbtlm640]

I am using the following code:

my.netlogo1 <- "my.netlogo1"
nl.path <- "C:/Program Files/NetLogo 6.1.1/app"
NLStart(nl.path, gui = FALSE,
nl.obj = my.netlogo1, nl.jarname='netlogo-6.1.1.jar')

I get the follo<ing error message:

java.lang.NoClassDefFoundError: org/nlogo/workspace/Controllable
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:416)
Caused by: java.lang.ClassNotFoundException
at RJavaClassLoader.findClass(RJavaClassLoader.java:383)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 2 more

I read it was because of an issue with using Netlogo6 with the package RNetlogo, but I thought that had already been solved by the programmer, could you tell me what I'm doing wrong?