I need help bouncing ball delay w/ panning

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I need help bouncing ball delay w/ panning

trogdor10
Ok when I try so add this effect to a section of audio, I get an error message saying "nyquist did not return audio".  I have no idea what is causing the error but here is what the debug window says...

error: bad integer operation
Function: #<Subr-EXPT: #1c3d690>
Arguments:
  -1
  15
Function: #<FSubr-PROGV: #1c3c160>
Arguments:
  (QUOTE (*WARP*))
  (LIST (LIST (+ (WARP-TIME *WARP*) (* (WARP-STRETCH *WARP*) (MULT DELAY COUNT))) (WARP-STRETCH *WARP*) (WARP-FUNCTION *WARP*)))
  (PANBOUNCES (PAN3 (MULT 2 S) (SUM 0.5 (MULT MOVE (- UPCOUNT COUNT) (EXPT -1 COUNT)))) DECAY DELAY (- COUNT 1))
Function: #<FSubr-PROGV: #1c3c160>
Arguments:
  (QUOTE (*LOUD*))
  (LIST (SUM *LOUD* DECAY))
  (AT (MULT DELAY COUNT) (PANBOUNCES (PAN3 (MULT 2 S) (SUM 0.5 (MULT MOVE (- UPCOUNT COUNT) (EXPT -1 COUNT)))) DECAY DELAY (- COUNT 1)))
Function: #<FSubr-IF: #1c3df80>
Arguments:
  (= COUNT 0)
  (CUE S)
  (SIM (CUE S) (LOUD DECAY (AT (MULT DELAY COUNT) (PANBOUNCES (PAN3 (MULT 2 S) (SUM 0.5 (MULT MOVE (- UPCOUNT COUNT) (EXPT -1 COUNT)))) DECAY DELAY (- COUNT 1)))))
Function: #<Closure-PANBOUNCES: #1c01320>
Arguments:
  #<Sound: #1e723a0>
  -1.008
  0.0496
  15
Function: #<FSubr-PROGV: #1c3c160>
Arguments:
  (QUOTE (*WARP*))
  (LIST (LIST (LOCAL-TO-GLOBAL 0) 1 NIL))
  (IF (MINUSP (WARP-STRETCH *WARP*)) (BREAK "Negative stretch factor is not allowed"))
  (PANBOUNCES S (- 0 DECAY) DELAY COUNT)
1> [ gc: total 18640, 3574 free; samples 1KB, 0KB free ]

Help would be greatly appreciated.  I don't understand this coding as I am a noob to audacity, but I want that effect to work.