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

**URL:** <https://discourse.julialang.org/t/ode-solver-for-bvproblem-never-calls-the-provided-function-for-boundary-conditions/125447>\
**Category:** General Usage\
**Tags:** question\
**Created:** [February 1, 2025, 7:58am UTC](https://discourse.julialang.org/t/ode-solver-for-bvproblem-never-calls-the-provided-function-for-boundary-conditions/125447 "2025-02-01T07:58:16Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![ErikQQY](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/erikqqy/32/23074_2.png) [@ErikQQY](https://discourse.julialang.org/u/ErikQQY)\
**Post date:** [February 3, 2025, 2:47pm UTC](https://discourse.julialang.org/t/ode-solver-for-bvproblem-never-calls-the-provided-function-for-boundary-conditions/125447/9 "2025-02-03T14:47:51Z")

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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`.

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