ERROR: UndefVarError: AbstractEnsembleSolution not defined

General Usage
1

Hello. I get this error when I run this line: result = Optim.optimize(obj, [1.0,0.5], Optim.BFGS()). I am following an example at this web page: https://docs.juliadiffeq.org/latest/analysis/parameter_estimation.html

I believe I have all of the correct packages installed, of my installed packages below:
DiffEqBase v5.6.4
DiffEqParamEstim v1.7.1
DifferentialEquations v6.3.0
GR v0.39.1
Gadfly v1.0.1
IJulia v1.18.1
Interact v0.10.2
LaTeXStrings v1.0.3
Optim v0.19.3
Plots v0.24.0
PyPlot v2.8.1
RecursiveArrayTools v0.20.0
StochasticDiffEq v6.7.0
Sundials v3.3.0

2

Your issue is that you are on a very old version of DiffEqBase.jl. Could you try ]up to update your packages?

Note: this is probably the reason for Unable to precompile ParameterizedFunctions as well.

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