Initializing help system before first use

XPRSgetcallbacksolution

Purpose
Returns the primal values from the solution associated with the current callback.
Topic areas
Solution, Callback
Synopsis
int XPRSgetcallbacksolution(XPRSprob prob, int *p_available, double x[], int first, int last);
Arguments
prob 
The current problem.
p_available 
This variable will be set to 1 if a solution is available. May be NULL if not required.
x 
Double array of length last-first+1 where the values of the primal variables will be returned. May be NULL if not required.
first 
First column in the solution to return.
last 
Last column in the solution to return.
Example
See also examples addmipsol.c, els_managedcuts.c, els_usercuts.c, knapsack.c, savesol.c, solenum.c, tsp.c.
Further information
1. The function always returns data in the input space, even if the problem is currently in presolved state. Column indices should be in the range 0 to INPUTCOLS- 1.
2. This function may only be called within the following callbacks:
Callback Solution type returned
bariteration Barrier iteration solution
chgbranchobject Node relaxation solution
cutround Node relaxation solution
intsol New incumbent solution
nodelpsolved Node relaxation solution
optnode Node relaxation solution
preintsol Candidate incumbent solution
slpcascadeend SLP iteration solution
slpcascadestart SLP iteration solution
slpcascadevar SLP iteration solution (partially cascaded!)
slpcascadevarfail SLP iteration solution (partially cascaded!)
slpdrcol SLP iteration solution (partially updated!)
slpintsol New incumbent solution
slpiterend SLP iteration solution
slpiterstart SLP iteration solution
slpitervar SLP iteration solution
slppreupdatelinearization SLP iteration solution

3. Note that during the slpcascadevar, slpcascadevarfail and slpdrcol callbacks, the values of some variables may have already been updated while other variables may still carry their pre-cascading values, so the solution as a whole may be in an inconsistent state and it is generally not advised to look at the full solution but one should only look at the currently cascaded or previously cascaded or as-of-yet uncascaded variables individually.
Related topics
XPRSgetcallbackslacks, XPRSgetcallbackduals, XPRSgetcallbackredcosts, XPRSgetcallbackpresolvesolution, XPRSgetsolution.

Parent Topic Console and Library Functions

© 2001-2026 Fair Isaac Corporation. All rights reserved. This documentation is the property of Fair Isaac Corporation (“FICO”). Receipt or possession of this documentation does not convey rights to disclose, reproduce, make derivative works, use, or allow others to use it except solely for internal evaluation purposes to determine whether to purchase a license to the software described in this documentation, or as otherwise set forth in a written software license agreement between you and FICO (or a FICO affiliate). Use of this documentation and the software described in it must conform strictly to the foregoing permitted uses, and no other use is permitted.