Initializing help system before first use

problem.loaddelayedrows

Purpose
Specifies that a set of rows in the problem will be treated as delayed rows during a tree search. These are rows that must be satisfied for any integer solution, but will not be loaded into the active set of constraints until required.
Synopsis
problem.loaddelayedrows(rowind)
Argument
rowind 
An array of rows (i.e. xpress.constraint objects, indices, or names) to treat as delayed rows.
Example
This sets the first six matrix rows as delayed rows in the MIP problem prob. 
p.loaddelayedrows([0,1,2,3,4,5])
p.mipoptimize("")
Further information
Delayed rows must be set up before solving the problem. Any delayed rows will be removed from the problem after presolve and added to a special pool. A delayed row will be added back into the active matrix only when such a row is violated by an integer solution found by the Optimizer.
Related topics
problem.loadmodelcuts.

Parent Topic Xpress problem methods

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