FICO Xpress Optimization Examples Repository: Working with models, data and dynamic libraries in Mosel

ExSet.vb: Using sets in Mosel (requires burglari.mos)

retrieve a set by its model name
get the set size
get first and last set element
get the name or index of a set element

ExAs.vb: Using arrays with index sets (requires trans.mos)

get indexing sets of an array
get array type
enumerate array entries in usual and transposed order
enumerate true array entries

ExProb.vb: Accessing problems and solution information with Mosel (requires blend2.mos)

export problem to a file (MPS or LP format)
get problem status
get objective function value
get primal/dual solution values, and constraint activity

ExLib.vb: Working with models and accessing dynamic libraries in Mosel

load and unload BIM models
run a model in Mosel
display information about loaded models
display information about additional libraries required by the loaded models

DispMod.vb: Display the contents of a model; the information is read from a bim file

display run-time parameters, requirements, symbols, package/module dependencies, annotations

DispDso.vb: Display the contents of a module

display constants, types, control paramters, subroutines, I/O drivers

ExDrvs*.cb.: Use I/O drivers to handle Mosel output with a callback function, compile a model from memory to memory, load a bim file from memory, initialise arrays in the Model program from .NET objects and retrieve information from the model through memory.

ExDrvsCallback.vb: using 'dotnet:' I/O driver for data exchange via callbacks
ExDrvsRaw.vb: using 'dotnetraw:' I/O driver for data exchange in memory
ExDrvsStream.vb: using 'dotnetstream:' I/O driver working with streams for data exchange in memory

These .vb files can be run from the VB.NET project Mosel-VB.NET.vbproj (required auxiliary files: frmMain.vb, frmMain.resx, OptimizerLog.vb).

(!******************************************************* * Mosel Example Problems * * ====================== * * * * file blend2.mos * * ``````````````` * * Example for the use of the Mosel language * * (Blending problem from XPRESS-MP User Guide) * * * * Data given in the model. * * * * (c) 2008 Fair Isaac Corporation * * author: S. Heipcke, 2001 * *******************************************************!) model Blend ! Start a new model uses "mmxprs" ! Load the optimizer library public declarations ROres = 1..2 ! Range of Ores REV = 125 ! Unit revenue of product MINGRADE = 4 ! Min permitted grade of product MAXGRADE = 5 ! Max permitted grade of product COST: array(ROres) of real ! Unit cost of ores AVAIL: array(ROres) of real ! Availability of ores GRADE: array(ROres) of real ! Grade of ores (measured per unit of mass) x: array(ROres) of mpvar ! Quantities of ores used LoGrade: linctr end-declarations COST :: [85.00, 93.00] AVAIL :: [60.00, 45.00] GRADE :: [2.1, 6.3] ! Objective: maximize total profit Profit:= sum(o in ROres) (REV-COST(o))* x(o) ! Lower and upper bounds on ore quality LoGrade:= sum(o in ROres) (GRADE(o)-MINGRADE) * x(o) >= 0 UpGrade:= sum(o in ROres) (MAXGRADE-GRADE(o)) * x(o) >= 0 ! Set upper bounds on variables forall(o in ROres) x(o) <= AVAIL(o) maximize(Profit) ! Solve the LP-problem end-model