OK, I see what’s going wrong, from your error stacktrace, the Radau solver you are trying to use is the RadauIIA5 solver from OrdinaryDiffEq.jl, RadauIIa5 in BoundaryValueDiffEq.jl should be the lowercase RadauIIa5.
OK, I see what’s going wrong, from your error stacktrace, the Radau solver you are trying to use is the RadauIIA5 solver from OrdinaryDiffEq.jl, RadauIIa5 in BoundaryValueDiffEq.jl should be the lowercase RadauIIa5.