# JuMP: Solver independent callback doesnt work for SCIP

**URL:** https://discourse.julialang.org/t/jump-solver-independent-callback-doesnt-work-for-scip/108490
**Category:** Optimization (Mathematical)
**Tags:** jump
**Created:** [January 8, 2024, 1:13am UTC](https://discourse.julialang.org/t/jump-solver-independent-callback-doesnt-work-for-scip/108490 "2024-01-08T01:13:35Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![odow](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/odow/32/28685_2.png) [@odow](https://discourse.julialang.org/u/odow)
#### Post date: [January 8, 2024, 1:29am UTC](https://discourse.julialang.org/t/jump-solver-independent-callback-doesnt-work-for-scip/108490/2 "2024-01-08T01:29:39Z")

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> [@sandyspiers](#):
>
> Are solver-independent callbacks actually supported by SCIP?

Heuristic and user-cut are, but I don’t think lazy constraints are supported; [Design restricted version of ConstraintHandler for LazyConstraint · Issue #271 · scipopt/SCIP.jl · GitHub](https://github.com/scipopt/SCIP.jl/issues/271) (admittedly vague issue)

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