IndexError: list index out of range in push_pixels

[dakhnod]

When running heatmap.py on the attached file I get this error:

loading
x: 6000, y: 38, z: (-103.960000, -8.680000)
drawing
Traceback (most recent call last):
  File "/home/daniel/Projects/hackrf/heatmap.py", line 618, in <module>
    img = push_pixels(args)
  File "/home/daniel/Projects/hackrf/heatmap.py", line 420, in push_pixels
    pix[x,y+tape_height+1] = rgb(zs[x])
  File "/home/daniel/Projects/hackrf/heatmap.py", line 360, in rgb_inner
    return palette[tone_scaled]
IndexError: list index out of range

Thanks for your work!
test.csv