Question: DifferentialEquations.jl and Runge-Kutte RK4 error

yes, i meant that with adaptive = false. Nevertheless, i get an output of

NaN + NaN*im

when evaluating

psi(a0+50.0*b0*im,x0,T0)

even after adding adaptive = false in the psi function definition, whereas the above-mentioned MATLAB’s package cfaffine.m function

cfaffine(-a0*i+b0*50,x0,T0,K0,K1,H0,H1,R0,R1,[],[],[],1)

happily computes the finite number of

0.3534 + 0.2271i.