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fix: exclude highspy 1.14.0 due to suboptimal MIP solutions#653

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fix: exclude highspy 1.14.0 due to suboptimal MIP solutions#653
FBumann wants to merge 1 commit intomasterfrom
fix/exclude-highspy-1.14.0

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@FBumann FBumann commented Apr 16, 2026

Summary

Closes #651

  • highspy 1.14.0 returns suboptimal solutions for modified MIP models (x=1, y=9 instead of optimal x=0, y=10)
  • Exclude !=1.14.0 from all dependency groups: docs, dev, and solvers
  • Affects test_modified_model[highs-*] across all platforms and Python versions on CI

Test plan

  • CI passes with highspy != 1.14.0
  • Re-evaluate when highspy 1.15.0+ is released

🤖 Generated with Claude Code

highspy 1.14.0 returns suboptimal solutions for modified MIP models,
causing test_modified_model to fail across all platforms. Exclude it
from all dependency groups (docs, dev, solvers).

Closes #651

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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FBumann commented Apr 16, 2026

Duplicate — #647 addresses this with a presolve workaround instead of version exclusion. See also #648.

@FBumann FBumann closed this Apr 16, 2026
@FBumann FBumann reopened this Apr 16, 2026
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coroa commented Apr 17, 2026

Merged #648 .

@coroa coroa closed this Apr 17, 2026
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bug: test_modified_model fails with HiGHS 1.14 — suboptimal MIP solution

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