Comments (2)
jajhall
commented on July 20, 2024
The HIGHS IPM solver has simply failed. The following suggest that the problem is numerically challenging
LU pivot tolerance tightened to 0.3
LU pivot tolerance tightened to 0.9
The final values of 1.67715856e+10 and 6.92604238e+09 for the primal and dual objective values have a big gap, and whilst
max absolute primal residual = 1.261e-05
isn't so bad
max absolute dual residual = 0.001563
is less encouraging.
This isn't a bug, just a failure
Thanks for your kind words, we're used to people only getting in touch when things go wrong!
from highs.
karldw
commented on July 20, 2024
This is enormously helpful. Thank you!
from highs.
Related Issues (20)
- Add irreducible inconsistent system (IIS) identification for LP
- Build fails on macOS: `f951: Error: '-fno-fat-lto-objects' are supported only with linker plugin` HOT 3
- Get Column Cost HOT 1
- Spurious statement of Integer when writing model HOT 1
- primal_solution_status is reported as kSolutionStatusFeasible for infeasible model when solver=ipm and presolve=off
- How to Set a Partial MIP Solution using setSolution()? HOT 11
- Logging header not printed if `h.writeModel` or `h.writeSolution` called before a method using the HighsIO
- `Highs::writeModel("")` uses `HighsIO`, but `Highs::writeSolution("")` uses `fprintf` for stdout HOT 1
- HiGHS 1.7.1 HighsCallbackDataOut data type can no longer be accessed directly for mip_solution item. HOT 1
- Time limit solving Jeroslow MIP seems not to be triggered HOT 2
- Stop MIP solve on `simplex_iteration_limit` (or other LP iteration limit) - Access iteration count via callback? HOT 2
- CMake configuration fails with versions >3.23.0 and <3.24.0
- Longer runtimes for ILP models created with `addVariable` versus `addCol` HOT 4
- PInvokeStackImbalance exception when targetting .NET Framework (Windows)
- highspy API improvements and benchmark HOT 1
- Stream HiGHs solver output in pyomo HOT 1
- Add user cuts
- Running in Parallel gives unexpected result. HOT 9
- LeakSanitizer locates memory leaks in highs HOT 2
- linker error due to .res files from v1.7.0
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