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
Additional information on all IBM software available to academics can be
found on the IBM Academic Resources
The user must submit a model in AMPL
format. Examples are provided in the examples
section of the AMPL website.
The problem must be specified in a model file. A data file and commands
files may also be provided. If the commands file is specified, it must
contain the AMPL solve command; however, it must not contain
the model or data commands. The model and data
files are renamed internally by NEOS.
The commands file may include option settings for the solver. To specify
solver options, add
option cplex_options 'OPTIONS';
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: