# Question about JuMPChance

**URL:** <https://discourse.julialang.org/t/question-about-jumpchance/27056>\
**Category:** General Usage\
**Tags:** jump\
**Created:** [August 1, 2019, 12:22am UTC](https://discourse.julialang.org/t/question-about-jumpchance/27056 "2019-08-01T00:22:32Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Y\_Li](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/y_li/32/7573_2.png) [@Y\_Li](https://discourse.julialang.org/u/Y_Li)\
**Post date:** [August 1, 2019, 12:22am UTC](https://discourse.julialang.org/t/question-about-jumpchance/27056/1 "2019-08-01T00:22:32Z")

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Hi, this is my first time using JuMPChance package, there seems to be some problems regarding to setting @indepnormal variables.

> Blockquote  
> using JuMPChance  
> using JuMP  
> using Gurobi  
> var\_para = [0.1 0.1 0.1]  
> m\_chance=ChanceModel(solver=GurobiSolver())  
> @variable(m\_chance, x[1:3])  
> @indepnormal(m\_chance, z[i=1:3], mean=0, var=var\_para[i])  
> @objective(m\_chance, Min, sum{x[i], i=1:3})  
> @constraint(m\_chance, z.\*x \>=-1, with\_probability=0.95)  
> solve(m\_chance,method=:Reformulate)

When I run the code, it returns “UndefVarError: undef not defined” at line  
@indepnormal(m\_chance, z[i=1:3], mean=0, var=var\_para[i])  
Could anyone tell me which part went wrong please?