solver:solver

Table of Contents

Solver Issues

Solver Issues

General

LP/MIP/QCP

Academic Programs by Solver Partners
Counting the number of discrete variables
MIP:Terminating the optimization after the first feasible solution
Providing additional debugging information, if a model is integer infeasible
References for LP/QP-Presolve Techniques
What is the meaning of the marginal prices in the GAMS output for a MIP
Default upper bound for an integer Variable
Sensitivity analysis (parameter ranges) for LP
What is optca/optcr
Why do various MIP solvers give differing answers to my problem
Multiple solutions of a MIP
Non integer results of a MIP
How do I fix a semiint/cont Variable
ALPHAECP
- Execution error(s) after solve and scr-files in working directory
BDMLP
- NODETABLE limit exceeded
CPLEX
- CPLEX Performance Tuning for Mixed Integer Programs (by IBM ILOG CPLEX)
- Objective of fixed model is different than the reported MIP solution
- Using lazy constraints or user cuts
- Using the MIPSTART - Option
- Error 1001 Out of Memory
- Terminate the optimization after GAMS/CPLEX reaches a certain value of the objective
- GAMS/CPLEX returns slightly non integer levels for integer/binary variables
- A reference for the Cplex 'Sifting'-Method
- Multiple Cplex threads
- Sensitivity Analysis with GAMS/CPLEX and GAMS/GUROBI
- Fixed LP of a MIP is infeasible
- Getting a list of best integer solutions of my MIP Model
- Branching on sums of binary variables
- "Improving" the precision of the interior point method
- Presolve found the problem infeasible or unbounded
- GAMS/Cplex 9: Parallel option is on GAMS license but gamscplex.ilm is missing or..
- Getting a list of the default values for CPLEX options within GAMS
- CPLEX Error 32201: ilm: CPLEX: license file not found or unreadable
- GAMS/CPLEX versus CPLEX callable library
- Is it possible that a concurrent execution takes longer than a non-concurrent execution for the same model
- How is resusd being calculated when Cplex runs sequentially/parallel
- GAMS/CPLEX-Link and OSICPLEX-Link Licenses
- Enforce GAMS/CPLEX to calculate marginals (dual values) for QCP models
- Distributed MIP with GAMS/CPLEX
GUROBI
- Sensitivity Analysis with GAMS/CPLEX and GAMS/GUROBI
- How do I get set up to run with a GAMS/Gurobi-Link license
- Distributed Parallel Algorithms with GAMS/Gurobi
MOSEK
- Warning 700
OSL
- Not enough memory to solve my problem with OSL
- What do I do if OSL crashes without warning
Xpress
- Difference between GAMS/XPRESS-Link and GAMS/XPRESS in the log file
- How do I get set up to run with a GAMS/XPRESS-Link license

NLP/MINLP/Global

COIN-OR

OsiCplex, OsiGurobi, OsiMosek, OsiXpress

More Resources

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