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solver
solver:solver
Table of Contents
Solver Issues
General
LP/MIP/QCP
NLP/MINLP/Global
COIN-OR
More Resources
Solver Issues
General
How can I hook my own solver to GAMS
Solver ignores the iterlim/reslim settings in my model
How do I automatically re-submit a model, which failed due to a solver license error
How much Memory (RAM) does my GAMS Run require
Model is unbounded / Model has an unbounded ray / Model Status 3 unbounded
Changing the default Solver
Intercepting a Solver Call
The Solver Option File
How do I interrupt a solver
Solver option file not found (wrong file extension)
The "D" solvers (GAMS/ConoptD, GAMS/ConvertD and GAMS/CplexD)
Solving a model to optimality
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
Some Notes on Scaling
Difference between NLP and DNLP-Models
Division by a variable makes model infeasible
The SCALE Option for NLP problems
Different results depending on the order of data
Different results under Windows and Linux
A newer version of the Solver returns a different Solution
Scaling the Hessian
Getting a list of best integer solutions of my MINLP Model
BARON
Supported sub solvers
Setting bounds on all variables
Setting the sub solvers
What does a + in the first position of a log line mean
Error "BARON has encountered a licensing error barstatus=11" despite of a valid BARON license
CONOPT
Infeasible solution. Reduced gradient less than tolerance
** Feasible solution. The tolerances are minimal and there is no change in objective..
** Fatal Error ** Insufficient memory for setup of optimization vectors
Infeasibility in the pre-triangular part of the model
Can I tell CONOPT to run the SLP algorithm exclusively
Model, which worked with an old version of CONOPT, fails after upgrading to the current version
Reliability of model if changing Rtmaxv
DICOPT
Bad rowindex in readat().
Illegal row type
Infeasible Subproblems
EMP
How can I change the default sub solver for EMP
IPOPT
Commercial version of IPOPT
LOGMIP
The input file ...logdisj.scr could not be opened. (LMLBOA)
MINOS
EXIT THE CURRENT POINT CANNOT BE IMPROVED UPON
TOO MANY ITERATIONS
MINOS declares infeasible model as feasible
MILES vs. PATH
SBB: Could not rename / Could not open control file
COIN-OR
OsiCplex, OsiGurobi, OsiMosek, OsiXpress
More Resources
GAMS Solvers Manuals
GAMS Solver Usage
solver/solver.txt
· Last modified: 2017/09/02 16:48 by
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