State dependent problem fails about delaydiffeq.jl

[ChrisRackauckas]

What version of DelayDiffEq and DiffEqBase do you have?

[aharoun]

DelayDiffEq v4.6.1 and DifferentialEquations v5.3.1

[devmotion]

With the latest changes an hour ago the tests pass (both locally on my computer and on Travis). Nevertheless you have to modify your example since dependent_lags has to be specified as a tuple of functions (u, p, t) -> lag (see the documentation about DDE problems). The following snippet runs on my computer (using the latest master branch):

using DelayDiffEq
f(du,u,h,p,t) = du .= h(p,t-delay)
delay = 1.0
problem = DDEProblem(f,[1.0],(p,t)->[1.0],(0.0,1.0),dependent_lags = ((u,p,t) -> delay,))
sol = solve(problem,MethodOfSteps(RK4()))

[ChrisRackauckas]

I would assume you have an older version of DiffEqBase then. What version of DiffEqBase do you have? On the latest versions, all of the callback handling functions are defined there, and that's where find_first_continuous_callback should be.

[aharoun]

I have DiffEqBase v4.31.0. Above code (defining dependent_lags as tuple) still does not work. I will try the latest master branch.

[ChrisRackauckas]

Master on DiffEqBase matches v4.31.0. This seems like a packaging issue. Are you sure you have the right versions in your environment? Using Julia v1.0?

[aharoun]

I am on Julia v1.0. I removed the package and added the latest master branch.

(v1.0) pkg> add https://github.com/JuliaDiffEq/DelayDiffEq.jl
  Updating git-repo `https://github.com/JuliaDiffEq/DelayDiffEq.jl`
 Resolving package versions...
 Installed DiffRules ─────── v0.0.7
 Installed DiffEqDiffTools ─ v0.7.1
 Installed DiffEqBase ────── v4.31.0
 Installed DiffEqOperators ─ v3.4.0
 Installed DiffBase ──────── v0.3.2
 Installed DiffResults ───── v0.0.3
  Updating `~/.julia/environments/v1.0/Project.toml`
  [bcd4f6db] + DelayDiffEq v4.6.1+ #master (https://github.com/JuliaDiffEq/DelayDiffEq.jl)
  Updating `~/.julia/environments/v1.0/Manifest.toml`
  [bcd4f6db] + DelayDiffEq v4.6.1+ #master (https://github.com/JuliaDiffEq/DelayDiffEq.jl)
  Building DiffEqBase → `~/.julia/packages/DiffEqBase/nW6r3/deps/build.log`

Test still fails and @devmotion's example does not work.

[aharoun]

OK. After installing Julia from scratch, now it works. I am not sure what was wrong with it but in any case thanks a lot!

[ChrisRackauckas]

Out of curiosity, how was it installed before?

[aharoun]

Just downloaded from here "https://julialang.org/downloads/" for Mac and install it. I had (possibly older versions of) DifferentialEquation.jl and OrdinaryDiffEq.jl in the previous installation. Although I removed them, I wonder if they caused the problem

[ChrisRackauckas]

Bizarre, but hey, you got it working so great!