# JuMP / SCS tutorial example fails on simple(?) data
**URL:** https://discourse.julialang.org/t/jump-scs-tutorial-example-fails-on-simple-data/125857
**Category:** Optimization (Mathematical)
**Tags:** jump
**Created:** [February 13, 2025, 10:44am UTC](https://discourse.julialang.org/t/jump-scs-tutorial-example-fails-on-simple-data/125857 "2025-02-13T10:44:31Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@healyp](https://discourse.julialang.org/u/healyp)
#### Post date: [February 13, 2025, 10:44am UTC](https://discourse.julialang.org/t/jump-scs-tutorial-example-fails-on-simple-data/125857/1 "2025-02-13T10:44:31Z")
Using the code verbatim as provided in the JuMP conic programming [tutorial](https://jump.dev/JuMP.jl/stable/tutorials/conic/ellipse_approx/) the SCS solver fails after 100,000 iterations on the matrix of five 2-D points below
```julia
julia> S
5×2 Matrix{Float64}:
39.1 18.7
39.5 17.4
40.3 18.0
36.7 19.3
39.3 20.6
```
with
```julia
100000| 1.73e+14 6.42e+07 1.65e+14 -8.27e+13 1.00e-06 1.07e+00
------------------------------------------------------------------
status: unbounded (inaccurate - reached max_iters)
timings: total: 1.07e+00s = setup: 1.40e-04s + solve: 1.07e+00s
lin-sys: 8.45e-02s, cones: 8.13e-01s, accel: 2.53e-02s
------------------------------------------------------------------
objective = -inf (inaccurate)
------------------------------------------------------------------
Test Failed at /home/healyp/res/ellipse/src/ell.jl:33
Expression: is_solved_and_feasible(model)
```
Could anybody please offer any advice / suggestions?
---
### Author:  [@abulak](https://discourse.julialang.org/u/abulak)
#### Post date: [February 13, 2025, 3:58pm UTC](https://discourse.julialang.org/t/jump-scs-tutorial-example-fails-on-simple-data/125857/2 "2025-02-13T15:58:56Z")
Try `CSDP` Optimizer; `SCS` has numerical problems with this example of `S`
---
### Author:  [@odow](https://discourse.julialang.org/u/odow)
#### Post date: [February 13, 2025, 7:55pm UTC](https://discourse.julialang.org/t/jump-scs-tutorial-example-fails-on-simple-data/125857/3 "2025-02-13T19:55:42Z")
Try Clarabel.jl. I’ll update the docs to use it too.
---
### Author:  [@healyp](https://discourse.julialang.org/u/healyp)
#### Post date: [February 21, 2025, 8:26am UTC](https://discourse.julialang.org/t/jump-scs-tutorial-example-fails-on-simple-data/125857/4 "2025-02-21T08:26:29Z")
Thank you – and please don’t mistake silence for ingratitude 🙂
For this, and a more realistic example, `CSDP` ran to completion.
@odow Thank you, also, but Clarabel.jl also choked on the toy example I provided above.
---
### Author:  [@pgoulart](https://discourse.julialang.org/u/pgoulart)
#### Post date: [February 26, 2025, 9:44am UTC](https://discourse.julialang.org/t/jump-scs-tutorial-example-fails-on-simple-data/125857/5 "2025-02-26T09:44:30Z")
I am unable to reproduce this error in Clarabel.jl. The problem solves fine for me using your toy example data in all recent solver versions and on both x86\_64 and aarch64.
If you are able to reproduce it, could you please open it as an issue on the solver github page?
---
### Author:  [@healyp](https://discourse.julialang.org/u/healyp)
#### Post date: [February 26, 2025, 8:40pm UTC](https://discourse.julialang.org/t/jump-scs-tutorial-example-fails-on-simple-data/125857/6 "2025-02-26T20:40:44Z")
Thank you. I have just filed an issue supplying data and code.