[PD] tanh~ (core dumped)

[Kosmas Giannoutakis]

Hi, i want to implement the tanh function in PD Vanilla. I use the formula y(x) = (1 - b*e^-(a*x + lnb))/(1/b + e^-(a*x + lnb)) where (a) is a steepness parameter and b controls the amplitude range. You can see my implementation which seems to work,  but when I incorporate it to larger patches, I get a core dumped...

Any clue why is this happening or any suggestions for a better implementation?

Thanks,
Kosmas
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