SuperBufRd help page example throws exception

[avdrd]

I've tried this example provided on the SuperBufRd help page

b = Buffer.read(s, Platform.resourceDir +/+ "sounds/a11wlk01.wav");

(
{
  var phaseInt, phaseDec;
  # phaseInt, phaseDec = SuperPhasor.ar(0, BufRateScale.kr(b), 0, 0, Float.from32Bits(b.numFrames), 0);
  SuperBufRd.ar(1, b, phaseInt, phaseDec);
}.play;
)

But it throws an exception.

ERROR: Message 'at' not understood.
Perhaps you misspelled 'as', or meant to call 'at' on another receiver?
RECEIVER:
Instance of SuperPair {    (000002770D380378, gc=60, fmt=00, flg=00, set=02)
  instance variables [2]
    msd : instance of OutputProxy (000002770E09D828, size=11, set=4)
    lsd : instance of OutputProxy (000002770E09D408, size=11, set=4)
}
ARGS:
   Integer 0

PROTECTED CALL STACK:
	Meta_MethodError:new	0000027710921800
		arg this = DoesNotUnderstandError
		arg what = nil
		arg receiver = SuperPair(an OutputProxy, an OutputProxy)
	Meta_DoesNotUnderstandError:new	0000027710923B40
		arg this = DoesNotUnderstandError
		arg receiver = SuperPair(an OutputProxy, an OutputProxy)
		arg selector = at
		arg args = [ 0 ]
	Object:doesNotUnderstand	000002770DCF3640
		arg this = SuperPair(an OutputProxy, an OutputProxy)
		arg selector = at
		arg args = nil
	a FunctionDef	000002770E0DBE18
		sourceCode = "{
  var phaseInt, phaseDec;
  # phaseInt, phaseDec = SuperPhasor.ar(0, BufRateScale.kr(b), 0, 0, Float.from32Bits(b.numFrames), 0);
  SuperBufRd.ar(1, b, phaseInt, phaseDec);
}"
		var phaseInt = nil
		var phaseDec = nil
	SynthDef:buildUgenGraph	000002771036A380
		arg this = a SynthDef
		arg func = a Function
		arg rates = nil
		arg prependArgs = [  ]
		var result = nil
		var saveControlNames = [ ControlName  P 0 i_out scalar 0 ]
	a FunctionDef	000002770AC1F980
		sourceCode = "<an open Function>"
		arg i_out = an OutputProxy
		var result = nil
		var rate = nil
		var env = nil
	SynthDef:buildUgenGraph	000002771036A380
		arg this = a SynthDef
		arg func = a Function
		arg rates = nil
		arg prependArgs = [  ]
		var result = nil
		var saveControlNames = nil
	a FunctionDef	00000277103689C0
		sourceCode = "<an open Function>"
	Function:prTry	000002770FB37A40
		arg this = a Function
		var result = nil
		var thread = a Thread
		var next = nil
		var wasInProtectedFunc = false
	
CALL STACK:
	DoesNotUnderstandError:reportError
		arg this = <instance of DoesNotUnderstandError>
	Nil:handleError
		arg this = nil
		arg error = <instance of DoesNotUnderstandError>
	Thread:handleError
		arg this = <instance of Thread>
		arg error = <instance of DoesNotUnderstandError>
	Object:throw
		arg this = <instance of DoesNotUnderstandError>
	Function:protect
		arg this = <instance of Function>
		arg handler = <instance of Function>
		var result = <instance of DoesNotUnderstandError>
	SynthDef:build
		arg this = <instance of SynthDef>
		arg ugenGraphFunc = <instance of Function>
		arg rates = nil
		arg prependArgs = nil
	Function:play
		arg this = <instance of Function>
		arg target = <instance of Group>
		arg outbus = 0
		arg fadeTime = 0.02
		arg addAction = 'addToHead'
		arg args = nil
		var def = nil
		var synth = nil
		var server = <instance of Server>
		var bytes = nil
		var synthMsg = nil
	Interpreter:interpretPrintCmdLine
		arg this = <instance of Interpreter>
		var res = nil
		var func = <instance of Function>
		var code = "(
{
  var phaseInt, phaseDec..."
		var doc = nil
		var ideClass = <instance of Meta_ScIDE>
	Process:interpretPrintCmdLine
		arg this = <instance of Main>
^^ ERROR: Message 'at' not understood.
Perhaps you misspelled 'as', or meant to call 'at' on another receiver?
RECEIVER: SuperPair(an OutputProxy, an OutputProxy)

I'm guessing it has something to do with new parameters that were added more recently added to the implementation to which #29 is related.

[mousaique]

still seems to be the case. any perspective on updating the ugens? thanks!