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Working with models, data and dynamic libraries in Mosel

Description
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).

mmexdatavb.zip[download all files]

Source Files
By clicking on a file name, a preview is opened at the bottom of this page.
ExSet.vb[download]
ExAs.vb[download]
ExProb.vb[download]
ExLib.vb[download]
DispMod.vb[download]
DispDso.vb[download]
ExDrvsCallback.vb[download]
ExDrvsRaw.vb[download]
ExDrvsStream.vb[download]
OptimizerLog.vb[download]
frmMain.vb[download]
frmMain.resx[download]
Mosel-VB.NET.vbproj[download]

Data Files
burglari.mos[download]
trans.mos[download]
blend2.mos[download]
chess2.mos[download]




chess2.mos

(!*******************************************************
  * Mosel Example Problems                              *
  * ======================                              *
  *                                                     *
  * file chess2.mos                                     *
  * ```````````````                                     *
  * Example for the use of the Mosel language           *
  * (Small LP-problem from XPRESS-MP User Guide)        *
  *                                                     *
  * (c) 2008 Fair Isaac Corporation                     *
  *     author: S. Heipcke, 2001                        *
  *******************************************************!)

model 'Chess Problem'

uses "mmxprs"                     ! Load the optimizer library

declarations
 xs: mpvar                        ! Number of small chess sets to make
 xl: mpvar                        ! Number of large chess sets to make
end-declarations

 Profit:= 5*xs + 20*xl            ! Objective: maximize total profit

 mc_time:= 3*xs + 2*xl <= 400     ! Limit on available machine time
 wood:=      xs + 3*xl <= 200     ! Limit on available wood

 maximize(Profit)                 ! Solve the LP-problem

end-model
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