# "BoundError: attempt to access JuMP containers" when creating a constraint

**URL:** https://discourse.julialang.org/t/bounderror-attempt-to-access-jump-containers-when-creating-a-constraint/100306
**Category:** Optimization (Mathematical)
**Created:** [June 14, 2023, 12:49am UTC](https://discourse.julialang.org/t/bounderror-attempt-to-access-jump-containers-when-creating-a-constraint/100306 "2023-06-14T00:49:02Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Luiz\_Monteiro](https://avatars.discourse-cdn.com/v4/letter/l/b77776/32.png) [@Luiz\_Monteiro](https://discourse.julialang.org/u/Luiz_Monteiro)
#### Post date: [June 14, 2023, 12:49am UTC](https://discourse.julialang.org/t/bounderror-attempt-to-access-jump-containers-when-creating-a-constraint/100306/1 "2023-06-14T00:49:02Z")

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Hi, I’m trying to create a constraint like specified below, but have this error: “ERROR: BoundsError: attempt to access JuMP.Containers.SparseAxisArray{VariableRef, 3, Tuple{Int64, Int64, Bool}} with 44 entries at index”.  
I can’t find the formulation error. Could anybody help me to fix it?  
Thanks in advance

Vstation = collect(12:15)  
Vcustomer = collect(2:11)  
V0\_customer = collect(1:11)  
Vtotal = collect(1:15)  
Q = 10000  
@variable(model1, 0 \<= q\_in\_st[i in V0\_customer, h in Vstation] \<=Q)  
@variable(model1, 0 \<= q[i in Vtotal, j in Vtotal] \<=Q)

@constraint(model1, con5[f in Vcustomer, j in Vstation], q\_in\_st[f,j] \<= sum(q[i,j] for i in V0\_customer if i != j))

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### Author: ![gdalle](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/gdalle/32/27854_2.png) [@gdalle](https://discourse.julialang.org/u/gdalle)
#### Post date: [June 14, 2023, 5:29am UTC](https://discourse.julialang.org/t/bounderror-attempt-to-access-jump-containers-when-creating-a-constraint/100306/2 "2023-06-14T05:29:59Z")

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Your code runs on my machine (provided I add `using JuMP` and `model1 = Model()`, don’t forget to make your examples as reproducible as possible for people who want to help 😉). Did you try in a fresh Julia session?

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<div class="post-metadata">

### Author: ![Luiz\_Monteiro](https://avatars.discourse-cdn.com/v4/letter/l/b77776/32.png) [@Luiz\_Monteiro](https://discourse.julialang.org/u/Luiz_Monteiro)
#### Post date: [July 7, 2023, 1:37am UTC](https://discourse.julialang.org/t/bounderror-attempt-to-access-jump-containers-when-creating-a-constraint/100306/3 "2023-07-07T01:37:04Z")

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Thanks! After a restart my machine it worked. I think it was a bug.