[bishwajitdgp]

I am simulating an combustion reaction using CH4 and O2 as reactants and finite-rate chemistry reaction.

When I am specifying both CH4 and O2 mass fraction as 0.5 each the simulation does not fails, but when I am specifying CH4 mass fraction as 0.2 and O2 mass fraction as 0.8, the simulation fails showing error:

ERROR #001100279 has occurred in subroutine ErrAction.
Message:
Floating point exception: Overflow

Can anybody help on the problem