v9.8-rte1.1

What's Changed

• use XPRSmipoptimize and XPRSlpoptimize instead of XPRSminim and XPRSmaxim by @sgatto in #114
• Set Xpress specific parameters before generic ones by @tbittar in #129

New Contributors

• @tbittar made their first contribution in #129

Full Changelog: v9.8-rte1.0...v9.8-rte1.1

v9.8-rte1.0

First release using the 9.8 Google version

SCIP support ON

Notable changes

• Update to Ortools 9.8
• Cleaner Xpress interface
• Refactoring of the Xpress and Sirius unit tests (coherently to Google conventions)
• Cleaner CI GitHub Actions
• Xpress unit tests do not use macros anymore

breaking changes

• callbacks for Java and Python are not availables
• for Xpress, in order to give to MPSolver a starting basis:
  • MPSolver::SetStartingLpBasisInt is deprecated (available since v9.5-rte4.0)
  • MPSolver::GetFinalLpBasisInt is deprecated (available since v9.5-rte4.0)
  • MPSolver::SetStartingLpBasis must be used instead SetStartingLpBasisInt
  • MPVariable::basis_status() and MPConstraint::basis_status() must be used instead of MPSolver::GetFinalLpBasisInt to retrieve the statuses variable by variable or constraint by constraint

v9.8-rte1.0-beta3

Use the Sirius Matrix flag at configure time (Windows) to ship Sirius into OR-Tools when SIRIUS=ON.

v9.8-rte1.0-beta2

xpress 9.0 to 9.2

v9.8-rte1.0-beta

First release using the 9.8 Google version

SCIP support ON

Notable changes

• Update to Ortools 9.8
• Cleaner Xpress interface
• Refactoring of the Xpress and Sirius unit tests (coherently to Google conventions)
• Cleaner CI GitHub Actions

breaking changes

• callback for Java and Python are not available
• for Xpress, in order to give to MPSolver a starting basis:
  • MPSolver::SetStartingLpBasisInt is deprecated (available since v9.5-rte4.0)
  • MPSolver::GetFinalLpBasisInt is deprecated (available since v9.5-rte4.0)
  • MPSolver::SetStartingLpBasis must be used instead SetStartingLpBasisInt
  • MPVariable::basis_status() and MPConstraint::basis_status() must be used instead of MPSolver::GetFinalLpBasisInt to retrieve the statuses variable by variable or constraint by constraint

v9.5-rte3.0

This is the last Release before we bump to Ortools 9.8

Improvements on the usage of the library with Xpress

• it is now possible to suggest a feasible solution to Xpress by using the SetHint method
• improve usage of Xpress environment variables, we are now compliant with the standard Xpress installation
  • XPRESSDIR point to the path of the Xpress installation root-dir
  • XPAUTH_PATH is the path of the license file
• it is now possible for the user to define a call-back when XPRESS finds a new feasible integer solution (in MIP mode) and extract this solution
• improve Xpress performances by updating all objective coefficients in one time

Delivery

• add support for OracleLinux8

Code quality and CI

• disable fragile test for the sirius interface
• improve the GitHub Actions workflows
• add support for OracleLinux8
• improve Xpress interface code quality

XPRSchobj One shot

This pre-release is intended to test #98

nightly

Nightly build

beta-v9.5-rte2.0 OracleLinux

Add support for OracleLinux

v9.5-rte2.0

Breaking change

Now compatible with XPRESS 9.0 only.

Bug fixes

Minor bug fix in workflows

Minor warning

The artifacts for OracleLinux-8 have been generated offline (using a new oracle.yml workflow) and added after the tag.

Full Changelog: v9.5-rte1.1...v9.5-rte2.0