Step!() remains strangely unfound if buried inside another method

General Usage
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4

As Steven said you are shadowing the function - think of it as overwriting the definition, so step! is not related to DynamicalSystems.step! at all.

Here’s a simple example:

julia> struct A end

julia> sum(x::A) = 5
sum (generic function with 1 method)

julia> sum(A())
5

julia> sum([1,2,3])
ERROR: MethodError: no method matching sum(::Vector{Int64})
You may have intended to import Base.sum

As you see, the sum I created there has only 1 method, so there is nothing for multiple dispatch to do. For multiple dispatch to work I’d have import Base.sum and extend it, like here (new session):

julia> struct A end

julia> import Base.sum

julia> Base.sum(x::A) = 5

julia> sum(A())
5

julia> sum([1,2,3])
6
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