NSLog confusion

WO 5.3.1 deploying on redhat enterprise linux.

I have an issue with my project that only occurs when deployed. This
is forcing me to become familiar with NSLog. Unfortunately, I'm having
trouble getting output from NSLog. I was hoping that the following
code would produce output -

    public Application() {
        super();
	     NSLog.err.setIsVerbose(true);
	     NSLog.err.appendln("NSLog err enabled");
	     NSLog.debug.appendln("NSLog debug enabled");
     }

i have my project output path to my home directory. debugging enabled
check in instance settings.

obviously i'm not understanding something here. what am i missing?

many thanks,
matt