# UndefVarError

Hello Everyone ,
i have been struggling with a program that doesn’t want to run on Julia version 0.7, this is the Program:

``````struct OrthoNNDist <: DiscreteMultivariateDistribution
x0::Vector{Int64}
oc::Array{Int64,2}
x1s::Array
prob::Float64
#return a new uniform distribution with all vectors in x1s orthogonal to oc
function OrthoNNDist(x0::Vector{Int}, oc::Array{Int,2})
x1s = []
for i = 1:size(oc)[2]
x1 = x0 + oc[:, i]
if nonneg(x1)
push!(x1s, x1)
end
x1 = x0 - oc[:, i]
if nonneg(x1)
push!(x1s, x1)
end
end
new(x0, oc, x1s, 1.0/length(x1s))
end
end

Base.length(d::OrthoNNDist) = length(d.x0)

Distributions.rand(d::OrthoNNDist) = rand(d.x1s)

Distributions.pdf(d::OrthoNNDist, x::Vector) = x in d.x1s ? d.prob : 0.0
Distributions.pdf(d::OrthoNNDist) = fill(d.prob, size(d.x1s))
Distributions.logpdf(d::OrthoNNDist, x::Vector) = log(pdf(d, x))
``````

and it shows me always UndefVarError: DiscreteMultivariateDistribution not defined

Probably you are missing

``````using Distributions
``````