Calling NetBeans Platform application from the command line

Hi. I am launching my NetBeans Platform application from within another application calling it using ProcessBuilder. When using in it plain on its own it was working fine. 

However, now I want to pass some extra arguments, ie. a project directory from where the NBP applications was launched so that it would automatically import some files to the project from that directory.

When I pass all the arguments in my CustomStartup class, it doesn't do anything, neither prints any errors nor starts the application, but then I tried passing the arguments minus the last one, and I got an error saying that "there are parameters but nobody wants to process them". 

I specified to use my CustomStartup class as the main class in the .conf file, with the option 
Code:
-J-Dnetbeans.mainclass=com.cmclinnovations.startup.CustomStartup

 and added the jar file that wraps this custom class in the platform/core directory.

and my startup class is defined as follows:



Code:
public class CustomStartup {
    
    private static final String NB_MAIN_CLASS = "org.netbeans.core.startup.Main";

    public static void main(String[] args) throws Exception {
        System.out.println("Arguments before: " + Arrays.asList(args));

        ClassLoader classloader = Thread.currentThread().getContextClassLoader();        
        Class<?> mainClass = Class.forName(NB_MAIN_CLASS, true, classloader);
        Object mainObject = mainClass.newInstance();
        
        Method mainMethod = mainClass.getDeclaredMethod("main", new Class[]{String[].class});
       
        int size = args.length;
        String[] args2 = new String[size - 1];
        System.arraycopy(args, 0, args2, 0, size - 1);
        System.out.println("Arguments after: " + Arrays.asList(args2));
 
        mainMethod.invoke(mainObject, (Object) (args2));
    }
    
    
    
}



I was thinking this was a way to go, but I cannot seem to make it work. Maybe there is another way to pass the command line arguments to the main method that I don't know about?