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Error hot-starting the QP solver #2521

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@jajhall

The QP solver fails to hot start if HiGHS is given a basis and then a solution, since the solution invalidates the incumbent basis. It should be done in the reverse order. Create Highs::passSolutionAndBasis to take both and apply them in the right order.

However the Atwood repeated model solve exposes an error when the lower bound of a constraint is reduced (so the previous solution and basis are primal feasible), but are considered optimal incorrectly.

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  1. self-assigned this
    on Sep 3, 2025
  2. jajhall commented on Oct 11, 2026

    @jajhall
    SponsorMemberAuthor

    Thanks, but we are developing new QP ASM solver, so this won't be fixed. However, AP ASM issues are being collated for the benefit of its author.

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