How do I check if a float is divided by zero?

MFiX
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#1

Hello, everyone！
when I run the following case, I’m getting an error: float divided by zero. I checked the UDF of chemical reactions and can’t be sure which reaction rate has a denominator of zero, can someone help me to see that? Is there any way to quickly determine which chemical reaction is going wrong?
Looking forward to someone getting back to me, thanks in advance!
b0716-OCAC-3.mfx (28.7 KB)
usr_rates.f (4.9 KB)
usr_rates_des.f (6.7 KB)

#2

try printing out the variables to console