# Getting issue in optim.optimize function while bayesian estimating parameters of stochastic differential equation

**URL:** <https://discourse.julialang.org/t/getting-issue-in-optim-optimize-function-while-bayesian-estimating-parameters-of-stochastic-differential-equation/88628>\
**Category:** New to Julia\
**Created:** [October 12, 2022, 3:19pm UTC](https://discourse.julialang.org/t/getting-issue-in-optim-optimize-function-while-bayesian-estimating-parameters-of-stochastic-differential-equation/88628 "2022-10-12T15:19:56Z")\
**Posts on this page:** 1\
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**Author:** ![ChrisRackauckas](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/chrisrackauckas/32/77_2.png) [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)\
**Post date:** [October 12, 2022, 4:16pm UTC](https://discourse.julialang.org/t/getting-issue-in-optim-optimize-function-while-bayesian-estimating-parameters-of-stochastic-differential-equation/88628/2 "2022-10-12T16:16:22Z")

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Let’s solve things one at at time first. You still have: [Getting issue in chain\_sde while doing MCMC inference solution for SDEs](https://discourse.julialang.org/t/getting-issue-in-chain-sde-while-doing-mcmc-inference-solution-for-sdes/88613). That shows your versions are ancient, so any recent documentation will of course fail. Please share your `]st` on Julia v1.8.

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_[View the full topic](https://discourse.julialang.org/t/getting-issue-in-optim-optimize-function-while-bayesian-estimating-parameters-of-stochastic-differential-equation/88628)._