NEOS Interfaces to CPLEX

Sample Submissions
WWW Form - XML-RPC

CPLEX

The NEOS Server offers the IBM ILOG CPLEX Optimizer for the solution of linear programming (LP), mixed-integer linear programming (MILP), and second-order conic programming (SOCP) problems. Acceptable input formats for CPLEX on the NEOS server include AMPL, GAMS, LP, MPS, and NL formats.

Details on CPLEX can be found on the IBM CPLEX website. Additional information on all IBM software available to academics can be found on the IBM Academic Resources webpage.

Using the NEOS Server for CPLEX/LP


The user must submit a model in CPLEX LP format to solve a linear program.

The user may optionally specify two files. The first file may contain a list of CPLEX commands that the user would like executed before the file is read and the optimize command is executed. The second file may contain a list of CPLEX commands that will be executed after the CPLEX optimize command.

The user need not (or should not) include the 

read
or 
optimize
commands in these files. The CPLEX 
xecute
command is not allowed in these files.

Documentation on the CPLEX parameters that may be set is located in the CPLEX Optimization Studio Knowledge Center.

As an alternative to NEOS, you may try the IBM Decision Optimization Cloud for drag and drop solving.

Note: An email address is required for any submissions that use CPLEX. This email address will be forwarded to IBM and may be used by IBM for promotional purposes. When using the XML-RPC interface, you must add the following line into the XML file that is sent to NEOS: 

<email>your.address@email.edu</email>

Web Submission Form
LP file
Enter the location of the LP file
Options File
Enter the location of file containing CPLEX option setting
Display File
Enter the location of file containing post-optimization commands (display)
Basis file
Enter the path to a basis file (optional)
MIP start file
Enter the path to a MIP start file (optional)
Solution file
Enter the path to a solution file (optional)
Return .bas file
Check the box to include the basis file as part of the results (only valid for LPs)
Return .mst file
Check the box to include the MIP start file as part of the results (only valid for MILPs)
Return .sol file
Check the box to include the solution file as part of the results
Comments
Additional Settings


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