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fix: exclude highspy 1.14.0 (closes #685) #686

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Merged
FBumann merged 2 commits into from
May 27, 2026
Merged

fix: exclude highspy 1.14.0 (closes #685) #686

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b0a5636
fix: exclude highspy 1.14.0 to avoid suboptimal MIP solutions
FBumann May 27, 2026
fe8e901
chore: pin highspy in [dev] for deterministic CI
FBumann May 27, 2026
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5 changes: 4 additions & 1 deletion pyproject.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,9 @@ dependencies = [
"colorlog >= 6.8.0, < 7",
"tqdm >= 4.66.0, < 5",
# Default solver
"highspy >= 1.5.3, < 2",
# 1.14.0 excluded: presolve regression returns wrong MIP optima on big-M / invest-style models.
# Fixed on HiGHS `latest` branch but not yet released. See ERGO-Code/HiGHS#2975 and PyPSA/linopy#651.
"highspy >= 1.5.3, < 2, != 1.14.0",
# Visualization
"matplotlib >= 3.5.2, < 4",
"plotly >= 5.15.0, < 7",
Expand Down Expand Up @@ -86,6 +88,7 @@ dev = [
"pre-commit==4.6.0",
"pyvis==0.3.2",
"scipy==1.16.3", # 1.16.1+ required for Python 3.14 wheels
"highspy==1.13.1", # Latest known-good. Bump once HiGHS#2975 fix ships in 1.14.1+
"gurobipy==12.0.3; python_version < '3.14'", # No Python 3.14 wheels yet
"dash==3.3.0",
"dash-cytoscape==1.0.2",
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