Hello,
I am trying to use the envlpx opcode to control the frequency cutoff of a filter.
The Gen I am using is

f10612 0 4097 5 0.1 41 0.2100 41 0.1300 41 0.3400 41 0.2000 41 0.4200 41 0.1500 41 0.0000 41 0.2000 41 0.2400 41 0.4900 41 0.3000 41 0.4800 40 0.4900 41 0.4900 41 0.2800 41 0.3600 41 0.4900 41 0.4200 41 0.2200 41 0.1200 41 0.1300 41 0.1000 41 0.1000 41 0.1400 41 0.1000 41 0.2200 41 0.3500 41 0.3700 41 0.1000 41 0.2500 41 0.4000 41 0.2100 41 0.2800 41 0.6700 41 0.5300 41 0.2700 41 0.4200 40 0.1900 41 0.3100 41 0.4000 41 0.7000 41 0.2300 41 0.3500 41 0.6100 41 0.5300 41 0.6500 41 0.2600 41 0.3600 41 0.3300 82 0.4300 41 0.5300 41 0.3900 41 0.5900 41 0.5700 41 0.4800 41 0.6700 41 0.5100 41 0.5800 41 0.6300 41 0.3900 41 0.3000 40 0.5600 41 0.6600 41 0.5000 41 0.7600 41 0.6600 41 0.5100 41 0.5500 41 0.7800 41 0.7200 41 0.5900 41 0.3900 41 0.3800 41 0.7300 41 0.4200 41 0.6000 41 0.7000 41 0.4900 41 0.5700 41 0.5200 41 0.9000 41 0.5400 41 0.4800 41 0.7200 41 0.8700 41 0.9000 40 0.7800 41 0.5200 41 0.9400 41 0.4700 41 0.5500 41 0.5500 41 0.7500 41 0.6500 41 0.9600 41 0.8100 41 0.7700 41 1.0000 41 0.3400

but I have this message:

FTERROR, ftable 10612: illegal input vals for gen call, beginning:
f10612 0.00 4097.00 5.00 0.04 ...
ftable 100209:
ftable 100312:
new alloc for instr 1:
INIT ERROR in instr 1: rise func ends with zero
B 0.000 - note deleted. i1 had 1 init errors
B 0.000 .. 2.000 T 2.000 TT 2.000 M: 0.0
B 2.000 .. 3.000 T 3.000 TT 3.000 M: 24266.5
end of score. overall amps: 24266.5
overall samples out of range: 0
1 errors in performance

Could someone tell me why?

Thanks in advance.