# Issue with SS.solve using DynamicSS method in SteadyStateDiffEq
**URL:** https://discourse.julialang.org/t/issue-with-ss-solve-using-dynamicss-method-in-steadystatediffeq/133712
**Category:** Modelling & Simulations
**Tags:** steady-state, differentialequation
**Created:** [November 6, 2025, 4:05pm UTC](https://discourse.julialang.org/t/issue-with-ss-solve-using-dynamicss-method-in-steadystatediffeq/133712 "2025-11-06T16:05:36Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Bill\_Holmes](https://discourse.julialang.org/u/Bill_Holmes)
#### Post date: [November 6, 2025, 4:05pm UTC](https://discourse.julialang.org/t/issue-with-ss-solve-using-dynamicss-method-in-steadystatediffeq/133712/1 "2025-11-06T16:05:36Z")
I have a quick question about using SteadyStateDiffEq.jl. I am getting error behavior when trying to use the **DynamicSS** method (following [Steady State Solvers · DifferentialEquations.jl](https://docs.sciml.ai/DiffEqDocs/stable/solvers/steady_state_solve/)). Below is a MWE. I 1) define a standard ODEProblem, 2) use this to define a SteadyStateProblem, 3) solve using DynamicSS. Attempting to solve with the **DynamicSS()** yields the error shown below. Using the **SSRootFind()** method works (though this has some issues with my specific use case and so I want DynamicSS).
This seems like I’m making some sort of syntax / call error, but the docs / examples on this are a little thin. Can anyone point me to the correct usage?
I am using Julia 1.12.1 with the following package information (tried with 1.11.5, 1.11.7, 1.10.8 using clean environments also, same error). This is a clean environment with only these directly added.
```julia-auto
using Pkg
Pkg.activate("./Local_Env")
import SteadyStateDiffEq as SS
import DifferentialEquations as DE
function ode!(du, u, p, t)
rr, dd = p
du[1] = rr - dd * u[1]
end
tspan = (0.0, 100.0);
u0 = [1.0];
params = [2.0, 0.5];
odeprob_tmp = DE.ODEProblem(ode!, u0, tspan, params);
sol_test = DE.solve(odeprob_tmp, DE.Rodas5P()); # ODEProb verified
ssprob = SS.SteadyStateProblem(odeprob_tmp);
sol = SS.solve(ssprob, SS.DynamicSS(DE.Rodas5P())); ## Fails with error.
sol = SS.solve(ssprob, SS.SSRootfind());# Works as expected
```
---
### Author:  [@hexaeder](https://discourse.julialang.org/u/hexaeder)
#### Post date: [November 6, 2025, 8:02pm UTC](https://discourse.julialang.org/t/issue-with-ss-solve-using-dynamicss-method-in-steadystatediffeq/133712/2 "2025-11-06T20:02:12Z")
It’s a bug: [`solve(prob, DynamicSS(Tsit5()))` broken with NonlinearSolveBase@2.1.0 · Issue #99 · SciML/SteadyStateDiffEq.jl · GitHub](https://github.com/SciML/SteadyStateDiffEq.jl/issues/99)
The fix is already merged so it should work again with the next update of SteadyStateDiffEq.
---
### Author:  [@jClugstor](https://discourse.julialang.org/u/jClugstor)
#### Post date: [November 6, 2025, 11:07pm UTC](https://discourse.julialang.org/t/issue-with-ss-solve-using-dynamicss-method-in-steadystatediffeq/133712/3 "2025-11-06T23:07:16Z")
Yeah should be working now on SteadyStateDiffEq `v2.8.0`
---
### Author:  [@Bill\_Holmes](https://discourse.julialang.org/u/Bill_Holmes)
#### Post date: [November 7, 2025, 5:13pm UTC](https://discourse.julialang.org/t/issue-with-ss-solve-using-dynamicss-method-in-steadystatediffeq/133712/4 "2025-11-07T17:13:21Z")
Thanks! Spun up a new environment and it works. Thank you for the response.