Hello there,
My SuperCollider code (using a bunch of Trill sensors) works fine, when I execute it. Now I am trying to run it on boot, but when I launch it on boot the TrillCentroids UGen cannot be found.

Nov 03 17:17:11 bela stdbuf[242]: ERROR: Class not defined.
Nov 03 17:17:11 bela stdbuf[242]:   in interpreted text
Nov 03 17:17:11 bela stdbuf[242]:   line 99 char 29:
Nov 03 17:17:11 bela stdbuf[242]:                           centroids = TrillCentroids.kr(i2c_bus, i2c_address, thresh, prescaler);

I have extended the waiting time after boot, but that doesn't work.

This is the SuperCollider code that I am running:

/* MULTIPLE SENSORS WITH TRILL HUB */
fork{
	15.wait;


s = Server.default;

s.options.numAnalogInChannels = 8;
s.options.numAnalogOutChannels = 8;
s.options.numDigitalChannels = 16;

s.options.blockSize = 16;
s.options.numInputBusChannels = 2;
s.options.numOutputBusChannels = 2;

s.options.postln;

s.waitForBoot {
	
	
	
	SynthDef(\ring, {|t_recalibrate=0.0|
			var i2c_bus = 1;
			var i2c_address = 0x38;
			var thresh = 0.22; 
			var prescaler = 1;
			var touchsigs = DC.ar(0).dup(3);
			var centroids;
			var out, ping;
			
			//centroids = TrillCentroids.kr(i2c_bus, i2c_address, thresh, prescaler);
			centroids = TrillCentroids.kr(i2c_bus, i2c_address, thresh, prescaler);
			
			touchsigs[0] = Resonz.ar(WhiteNoise.ar(Lag.kr(centroids[1]* 5, 0.2) ),centroids[2].linexp(0.0, 10.0, 400, 8000), centroids[1].linexp(0.0, 1.0, 0.5, 0.01), 0.9);
			centroids[2].poll;
			touchsigs[1] = PMOsc.ar((centroids[3]+0.001) * 2500, 500, centroids[4].linexp(0.0, 2000, 0.1, 12.0), 0.1, mul: 0.5) 
			* EnvGen.ar(Env.perc, (centroids[4] > 0.0), timeScale: centroids[4].linexp(50, 500, 0.3, 5.0));

		// touch3 another percussive plucky sound with pull-off behavior
			touchsigs[2] = Resonz.ar(
			Pluck.ar(PinkNoise.ar, (centroids[6] < 0.05), 0.2, centroids[5].linexp(0.0, 1.0, 80, 1000).reciprocal, 3, 0.5, mul: 6.0),
			centroids[5].linexp(0.0, 1.0, 800, 2400), 0.1, 4.0).tanh;
		
			//out = Splay.ar(touchsigs);
			out = Mix(touchsigs);
			
			SendReply.kr(Impulse.kr(8), "/ring", centroids);
			
			ping = EnvGen.ar(Env.perc, t_recalibrate) * SinOsc.ar(440);
			
			Out.ar(0, out!2 );
			//Out.ar(0, ping);
			
		}).add;

	SynthDef(\square, {|t_recalibrate=0.0|
			var i2c_bus = 1;
			var i2c_address = 0x28;
			var thresh = 0.22; 
			var prescaler = 1;
			var touchsigs = DC.ar(0).dup(3);
			var centroids;
			var out, ping;
			
			//centroids = TrillCentroids.kr(i2c_bus, i2c_address, thresh, prescaler);
			 centroids = TrillCentroids.kr(i2c_bus, i2c_address, thresh, prescaler);
			
			touchsigs[0] = Pluck.ar(WhiteNoise.ar, (centroids[2] > 0 ), 0.2, centroids[1].linexp(0.0, 1.0, 70, 300).reciprocal, 5, 0.9);
			
			touchsigs[1] = PMOsc.ar((centroids[3]+0.001) * 2500, 500, centroids[4].linexp(0.0, 2000, 0.1, 12.0), 0.1, mul: 0.5) 
			* EnvGen.ar(Env.perc, (centroids[4] > 0.0), timeScale: centroids[4].linexp(50, 500, 0.3, 5.0));

		// touch3 another percussive plucky sound with pull-off behavior
			touchsigs[2] = Resonz.ar(
			Pluck.ar(PinkNoise.ar, (centroids[6] < 0.05), 0.2, centroids[5].linexp(0.0, 1.0, 80, 1000).reciprocal, 3, 0.5, mul: 6.0),
			centroids[5].linexp(0.0, 1.0, 800, 2400), 0.1, 4.0).tanh;
		
			//out = Splay.ar(touchsigs);
			out = Mix(touchsigs);
			
			SendReply.kr(Impulse.kr(8), "/square", centroids);
			
			ping = EnvGen.ar(Env.perc, t_recalibrate) * SinOsc.ar(440);
			
			Out.ar(0, out!2 );
			//Out.ar(0, ping);
			
		}).add;
		
		SynthDef(\flex, {|t_recalibrate=0.0|
			var i2c_bus = 1;
			var i2c_address = 0x48;
			var thresh = 0.01; 
			var prescaler = 4;
			var touchsigs = DC.ar(0).dup(3);
			var centroids;
			var out, ping;
			
			centroids = TrillCentroids.kr(i2c_bus, i2c_address, thresh, prescaler);
			
			touchsigs[0] = CombC.ar( Pluck.ar(WhiteNoise.ar, (centroids[2] > 0 ), 0.2, centroids[1].linexp(0.0, 1.0, 70, 300).reciprocal, 5, 0.9), 0.5, centroids[1].linexp(0.0, 1.0, 0.01, 0.5), 3.0 );
			
			touchsigs[1] = PMOsc.ar((centroids[3]+0.001) * 2500, 500, centroids[4].linexp(0.0, 2000, 0.1, 12.0), 0.1, mul: 0.5) 
			* EnvGen.ar(Env.perc, (centroids[4] > 0.0), timeScale: centroids[4].linexp(50, 500, 0.3, 5.0));

		// touch3 another percussive plucky sound with pull-off behavior
			touchsigs[2] = Resonz.ar(
			Pluck.ar(PinkNoise.ar, (centroids[6] < 0.05), 0.2, centroids[5].linexp(0.0, 1.0, 80, 1000).reciprocal, 3, 0.5, mul: 6.0),
			centroids[5].linexp(0.0, 1.0, 800, 2400), 0.1, 4.0).tanh;
		
			//out = Splay.ar(touchsigs);
			out = Mix(touchsigs);
			SendReply.kr(Impulse.kr(8), "/flex", centroids);
			
			ping = EnvGen.ar(Env.perc, t_recalibrate) * SinOsc.ar(440);
			
			Out.ar(0, out!2 );
			//Out.ar(0, ping);
			
		}).add;
		
		s.sync;
		~square_synth = Synth(\square);
		~flex_synth = Synth(\flex);
		~ring_synth = Synth(\ring);
		
		//OSCFunc(\trill, {|msg| msg[3..].postln }, "/trill");
		
		// Illustrates how to recalibrate the Trill sensor's baseline value if the touchpad configuration changes
		// {
		// 	loop {
		// 		55.wait;
		// 		"Reset baseline in 5s...".postln;
		// 		5.wait;
		// 		"Baseline reset!".postln;
		// 		~tr.set(\t_recalibrate, 1);
		// 	};
		// }.fork;
		




};



};

And there's a small CPP file to add the Trill library:

/***** SC_libs.cpp *****/
#include <libraries/Trill/Trill.h>

Do I need to add the Trill UGens in some kind of special way, when launching on boot?

Kind regards,

Sjoerd