@everywhere effect region / distributed calculation

General Usage
,
1

Hi, I have a problem with distributed calculation, here is a small example can reflect my question

@everywhere begin
    function f(x, b)
        return x^2 + sum(b)
    end
end

@everywhere using Distributed, SharedArrays

function example(a)       # without parameter a, this works well, with parameter a, it reminds a not defined 

    @everywhere begin
        xmin = 0.0
        xmax = 10.0
        datapoints = 10
        xtemp = range(xmin, xmax, length = datapoints + 1)
        b = [1, a]
    end

    rel = SharedVector{Float64}(datapoints + 1)
    @sync @distributed for i = 1:datapoints+1
        rel[i] = f(xtemp[i], b)
    end
    return rel
end


c = example(1)

Don’t know why it cannot identify a, any suggestions ?