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solver:solver [2018/05/18 14:13]
admin
solver:solver [2021/06/22 18:54] (current)
Atharv Bhosekar [LP/MIP/QCP]
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 ====== Solver Issues ====== ====== Solver Issues ======
 ===== General ===== ===== 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 ===== ===== LP/MIP/QCP =====
-  * [[Academic Programs by Solver Partners]] 
-  * [[Counting the number of discrete variables]]  ​ 
-  * [[Terminating the optimization after the first feasible solution|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   * BDMLP
     *[[NODETABLE limit exceeded]]     *[[NODETABLE limit exceeded]]
   * CPLEX    * CPLEX 
     * [[http://​www-01.ibm.com/​support/​docview.wss?​uid=swg21400023|CPLEX Performance Tuning for Mixed Integer Programs (by IBM ILOG CPLEX)]]     * [[http://​www-01.ibm.com/​support/​docview.wss?​uid=swg21400023|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 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]] 
-    * [[solver:​non_integer_results_of_a_mip|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|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]] 
-    * [[Implementing new branching rules|Branching on sums of binary variables]] 
-    * [["​Improving"​ the precision of the interior point method]] 
-    * [[Presolve found the problem infeasible or unbounded]] 
-    * [[Parallel option is on GAMS license but gamscplex.ilm is missing or |GAMS/Cplex 9: Parallel option is on GAMS license but gamscplex.ilm is missing or..]] ​ 
-    * [[Getting a list of the default values for CPLEX option within GAMS|Getting a list of the default values for CPLEX options within GAMS]] 
-    * [[CPLEX Error 32201|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]] ​     * [[GAMS/​CPLEX-Link and OSICPLEX-Link Licenses]] ​
-    * [[Enforce GAMS/CPLEX to calculate marginals (dual values) for QCP models]] 
-    * [[Distributed MIP with GAMS/​CPLEX]] ​ 
   * GUROBI   * GUROBI
-    * [[Sensitivity ​ Analysis with GAMS/​CPLEX|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   * 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??]] 
  
  
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 ===== NLP/​MINLP/​Global ===== ===== NLP/​MINLP/​Global =====
-  * [[Some Notes on Scaling]] 
-  * [[Difference ​ between NLP and DNLP-Models]] 
-  * [[Division by a variable makes model infeasible]] 
-  * [[gams:​the_scale_option_for_nlp_problems|The SCALE Option for NLP problems]] 
-  * [[(NLP) Different results depending on the order of data|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 MIP Model|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 ​   * 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  ​   * DICOPT  ​
-    * [[Bad rowindex in readat().]] +  ​* MINOS
-    * [[(DICOPT) Illegal row type|Illegal row type]] +
-    * [[Infeasible NLP'​s|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|SBB: Could not rename ​ / Could not open control file]] ​  +
  
-===== COIN-OR ===== 
-   * [[OsiCplex, OsiGurobi, OsiMosek, OsiXpress]] ​ 
  
 ===== More Resources ===== ===== More Resources =====
IMPRESSUM / LEGAL NOTICEPRIVACY POLICY solver/solver.1526645586.txt.gz · Last modified: 2018/05/18 14:13 by admin