# Optim.jl --- Do all Methods Allow Box Constraints? Should all Work Without Them?

**URL:** <https://discourse.julialang.org/t/optim-jl-do-all-methods-allow-box-constraints-should-all-work-without-them/10209>\
**Category:** Optimization (Mathematical)\
**Created:** [April 6, 2018, 10:24pm UTC](https://discourse.julialang.org/t/optim-jl-do-all-methods-allow-box-constraints-should-all-work-without-them/10209 "2018-04-06T22:24:53Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Yifan\_Liu](https://avatars.discourse-cdn.com/v4/letter/y/4da419/32.png) [@Yifan\_Liu](https://discourse.julialang.org/u/Yifan_Liu)\
**Post date:** [April 7, 2018, 12:23am UTC](https://discourse.julialang.org/t/optim-jl-do-all-methods-allow-box-constraints-should-all-work-without-them/10209/4 "2018-04-07T00:23:40Z")

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> [@Optim DomainError](https://discourse.julialang.org/t/optim-domainerror/10101):
>
> I am fitting U.S. Kerosene daily price percentage change with Heston Nandi GARCH model. I use the Optim.optimize function for my MLE but got a domain error. My code using RData, Optim function LoadData() return load("Sample.RData")["Sample"] end function HNGARCH(param, sample = Sample) lambda = param[1] omega = param[2] beta = param[3] alpha = param[4] gamma = param[5] delta = param[6] y = sample[:log\_return] r = sample[:rf\_r…

I asked a similar question before.

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_[View the full topic](https://discourse.julialang.org/t/optim-jl-do-all-methods-allow-box-constraints-should-all-work-without-them/10209)._