Initializing help system before first use

XPRSloaddelayedrows

Purpose
Specifies that a set of rows in the matrix 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.
Topic areas
Problem Input, Cuts
Synopsis
int XPRS_CC XPRSloaddelayedrows(XPRSprob prob, int nrows, const int rowind[]);
Arguments
prob 
The current problem.
nrows 
The number of delayed rows.
rowind 
An array of row indices to treat as delayed rows.
Example
This sets the first six matrix rows as delayed rows in the MIP problem prob. 
int rowind[] = {0,1,2,3,4,5}
...
XPRSloaddelayedrows(prob,6,rowind);
XPRSmipoptimize(prob,"");
See also example tsp.c.
Further information
1. Delayed rows must be set up before solving the problem. Any delayed rows will be removed from the matrix 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.
2. This function cannot be called while the current problem is being solved or when it is in an interrupted state. Use XPRSpostsolve to restore the problem to a non-solving state.
Related topics
XPRSloadmodelcuts.

Parent Topic Console and Library Functions

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