NEOS Server Home

NEOS Interfaces to XpressMP

WWW Form & Sample Submissions


The NEOS Server offers XPRESS-MP, from Dash Associates, for the solution of linear programming problems that can be modeled in AMPL format.

Using the NEOS Server for XPRESS

The user must submit a model in AMPL format to solve a nonlinearly constrained optimization problem. Examples of models in AMPL format can be found in the AMPL library .

The model is specified by a model file, and optionally, a data file and a commands file. If the command file is specified it must contain the AMPL solve command. The commands file can contain any AMPL command. Printing directed to standard out is returned to the user with the output.

For information on Dash products and services, contact them at one of the following addresses:

Dash Optimization    
Blisworth House    		
Church Lane        		
Northants NN7 3BX
Phone: +44 (0) 1604 858 993     
Fax:   +44 (0) 1604 858 147     

560 Sylvan Avenue
Englewood Cliffs, New Jersey 07632
Phone: (201) 313-5297
Fax:   (201) 313-5299

An email address is required for any submissions to XPRESS solvers. This email address will be forwarded to Dash Associates and may be used by Dash Optimization for promotional purposes.

Enter the location of the ampl model (local file)
Model File:

Enter the location of the ampl data file (local file)
Data File:

Enter the location of the ampl commands file (local file)
Commands File:


Dry run: generate job XML instead of submitting it to NEOS
Short Priority: submit to higher priority queue with maximum CPU time of 5 minutes
e-mail address:

By submitting a job, you have accepted the Terms of Use
Please do not click the 'Submit to NEOS' button more than once.

Submit comments and questions Terms of Use