BoundsError trying to solve DDEProblem

[ChrisRackauckas]

@Achraf_el_fadli

prob = DDEProblem(f, u0, h, p, canstant_lag = [τ])

It says your tspan is wrong because you didn’t pass it to the problem constructor.

prob = DDEProblem(f, u0, h, tspan, p, canstant_lag = [τ])