SCIP optimizer status likely ser incorrectly.

[jd-lara]

JuMP can't retrieve the result of a successful optimize! call giving the result below. It might be a case that the status is set incorrectly in the MOI wrapper.

[jd-lara]

The problem goes away if direct_mode isn't used. So far I tried to reproduce in a small problem and didn't happen.

[matbesancon]

are you sture this is SCIP-related? It seems like a JuMP error no?

[matbesancon]

cc @odow

[odow]

We need a reproducible example, or the output of JuMP.solution_summary(model).

We only throw this error if the termination status is MOI.OPTIMIZE_NOT_CALLED:
https://github.com/jump-dev/JuMP.jl/blob/509ab616192bc90891c329010e2205f414c8cf94/src/optimizer_interface.jl#L716-L719

SCIP maps SCIP_STATUS_UNKNOWN to MOI.OPTIMIZE_NOT_CALLED:

SCIP.jl/src/MOI_wrapper/results.jl

Line 9 in 2d38976

SCIP_STATUS_UNKNOWN => MOI.OPTIMIZE_NOT_CALLED,

So perhaps the fix probably needs to happen in SCIP.jl. I don't know why the status would be unknown; it looks like the solver found a solution.