# Getting NaN output from JuMP variable after solving
**URL:** https://discourse.julialang.org/t/getting-nan-output-from-jump-variable-after-solving/65026
**Category:** Optimization (Mathematical)
**Tags:** question, jump
**Created:** [July 21, 2021, 8:39am UTC](https://discourse.julialang.org/t/getting-nan-output-from-jump-variable-after-solving/65026 "2021-07-21T08:39:53Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@manoj.centura](https://discourse.julialang.org/u/manoj.centura)
#### Post date: [July 21, 2021, 8:39am UTC](https://discourse.julialang.org/t/getting-nan-output-from-jump-variable-after-solving/65026/1 "2021-07-21T08:39:53Z")
Hi All,
I am running a linear program with Gurobi. The variable is set as
````julia
@variable(mod2,0<=L_time_bC[b in 1:18, c in 1:3] ) ```
I am using julia 1.62 with [c52e3926] Atom v0.12.32
[336ed68f] CSV v0.8.5
[9961bab8] Cbc v0.8.0
[a93c6f00] DataFrames v1.2.0
[c91e804a] Gadfly v1.3.3
[2e9cd046] Gurobi v0.9.14
[682c06a0] JSON v0.21.1
[4076af6c] JuMP v0.21.8
[e5e0dc1b] Juno v0.8.4
[f0f68f2c] PlotlyJS v0.16.4
[112f6efa] VegaLite v2.6.0
[ade2ca70] Dates
````
---
### Author:  [@Sukera](https://discourse.julialang.org/u/Sukera)
#### Post date: [July 21, 2021, 9:04am UTC](https://discourse.julialang.org/t/getting-nan-output-from-jump-variable-after-solving/65026/2 "2021-07-21T09:04:45Z")
Welcome! Please provide a minimal (non-)working example (preferrably copy-pastable). In your code, we don’t know what `L_time_bC` is and there is no indication what’s going wrong.
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### Author:  [@manoj.centura](https://discourse.julialang.org/u/manoj.centura)
#### Post date: [July 21, 2021, 9:08am UTC](https://discourse.julialang.org/t/getting-nan-output-from-jump-variable-after-solving/65026/3 "2021-07-21T09:08:20Z")
Thanks for the reply. I will try to provide a working example. Just to add the problem is not happening with Julia 1.2. what should be the compatible JuMP version for Julia 1.62
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### Author:  [@Sukera](https://discourse.julialang.org/u/Sukera)
#### Post date: [July 21, 2021, 9:10am UTC](https://discourse.julialang.org/t/getting-nan-output-from-jump-variable-after-solving/65026/4 "2021-07-21T09:10:52Z")
If you have added `JuMP` via Pkg (e.g. via `]add JuMP`), it will automatically pick the most recent version compatible with the julia version you’re using.
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### Author:  [@blegat](https://discourse.julialang.org/u/blegat)
#### Post date: [July 21, 2021, 1:22pm UTC](https://discourse.julialang.org/t/getting-nan-output-from-jump-variable-after-solving/65026/5 "2021-07-21T13:22:20Z")
Did you check the [solution status](https://jump.dev/JuMP.jl/v0.21.8/manual/solutions/) ? NaN value for JuMP variables are often obtained when the solver did not find any solution. You can see this with the different statuses. Posting the output of `solution_summary` here could help as well.