# Set options of \`Clarabel.jl\` via the \`Convex.jl\` interface
**URL:** https://discourse.julialang.org/t/set-options-of-clarabel-jl-via-the-convex-jl-interface/119538
**Category:** Optimization (Mathematical)
**Created:** [September 18, 2024, 7:44am UTC](https://discourse.julialang.org/t/set-options-of-clarabel-jl-via-the-convex-jl-interface/119538 "2024-09-18T07:44:05Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@DanDoe](https://discourse.julialang.org/u/DanDoe)
#### Post date: [September 18, 2024, 7:44am UTC](https://discourse.julialang.org/t/set-options-of-clarabel-jl-via-the-convex-jl-interface/119538/1 "2024-09-18T07:44:05Z")
For the [`ECOS.jl`](https://github.com/jump-dev/ECOS.jl) solver I can do the following:
```julia
solve!(problem,
# Parameters taken from default values for EiCOS
Convex.MOI.OptimizerWithAttributes(ECOS.Optimizer, "b" => 0.99,
"delta" => 2e-7,
"feastol" => 1e-9,
"abstol" => 1e-9,
"reltol" => 1e-9,
"feastol_inacc" => 1e-4,
"abstol_inacc" => 5e-5,
"reltol_inacc" => 5e-5,
"nitref" => 9,
"maxit" => 100,
"verbose" => 3); silent = false)
```
i.e., set values for the [options](https://github.com/jump-dev/ECOS.jl?tab=readme-ov-file#options) easily.
How can I do that for the [`Clarabel.jl`](https://clarabel.org/stable/) solver? They also list a number of [settings](https://clarabel.org/stable/api_settings/#Clarabel-Solver-Settings), but if I try for instance
```julia
solve!(problem,
Convex.MOI.OptimizerWithAttributes(Clarabel.Optimizer,
"tol_feas" = 1e-8);
silent = false)
```
I receive
```julia
ERROR: syntax: invalid keyword argument name ""tol_feas""
```
Same if I try `:tol_feas`.
Any ideas? A solution would probably also be moving to JuMP if that allows me setting stricter values for feasibility.
---
### Author:  [@odow](https://discourse.julialang.org/u/odow)
#### Post date: [September 18, 2024, 8:23am UTC](https://discourse.julialang.org/t/set-options-of-clarabel-jl-via-the-convex-jl-interface/119538/2 "2024-09-18T08:23:05Z")
You need `"tol_feas" => 1e-8`. Note the `>` 😄
---
### Author:  [@DanDoe](https://discourse.julialang.org/u/DanDoe)
#### Post date: [September 18, 2024, 8:35am UTC](https://discourse.julialang.org/t/set-options-of-clarabel-jl-via-the-convex-jl-interface/119538/3 "2024-09-18T08:35:58Z")
Should have given it a second look before posting here. Thanks!
---
### Author:  [@odow](https://discourse.julialang.org/u/odow)
#### Post date: [September 18, 2024, 8:37am UTC](https://discourse.julialang.org/t/set-options-of-clarabel-jl-via-the-convex-jl-interface/119538/4 "2024-09-18T08:37:58Z")
> [@DanDoe](#):
>
> Should have given it a second look before posting here
No worries 😄 It only took me a second _to_ look.