ODE solver for BVProblem never calls the provided function for boundary conditions

General Usage
41

The expected REPL should be:

(jl_HFqaMY) pkg> st
  [85d9eb09] BoundaryValueDiffEqFIRK v1.4.0

julia> using BoundaryValueDiffEqFIRK

julia> RadauIIa5
RadauIIa5

julia> RadauIIA5
ERROR: UndefVarError: `RadauIIA5` not defined in `Main`
Suggestion: check for spelling errors or missing imports.

I have to say your issue is really weird, RadauIIA5 is from OrdinaryDiffEq.jl for ODE solving, and RadauIIa5 is from BoundaryValueDiffEq.jl for BVP solving, while both of them are Radau methods, they are actually handling different type of problems. And it is not possible to access RadauIIA5 without using OrdinaryDiffEq, so can you make sure you restart the REPL session before executing these commands in REPL?

42

No, first time you mentioned this.
Yes, if I start a new session, it works as you say it should.

So, why can’t I trust the result from “]status” ?!!!

43

Ahh, so here is the problem, it is not that you can’t trust “]status”. I believe in the previous REPL session, there are some misusing errors which caused the confusion, but luckily we have figured them out

44

Thanks for the link:

BoundaryValueDiffEq.jl/lib/BoundaryValueDiffEqFIRK/test/expanded
/firk_basic_tests.jl

The ony place I see anything about initialguess in this loooong piece of code is

# Not able to change the initial condition.
# Hard coded solution.

suggesting that initialguess is not even implemented yet.

True?

45

Well, before we “sweep this dust under the rug”,
let’s try to understand what errors can cause this confusion.

46

Well those comments may not be about initialguess.
If there is anything there about initialguess, could you please extract thatcode snippet for me?
thanks

47

Please see two follow-up discourses 125509 & 125510.
thanks!