Initializing help system before first use

# XSLPsetcbcascadevarfail, XPRSsetcbslpcascadevarfail

Purpose
Set a user callback to be called after cascading a column was not successful
Topic areas
Callback, SLP, Cascading
Synopsis
`int XPRS_CC XSLPsetcbcascadevarfail(XSLPprob prob, int (XPRS_CC *cascadevarfail) (XSLPprob cbprob, void *cbdata, int col), void *data);`
Arguments

prob | The current SLP problem.
cascadevarfail | The function to be called after cascading a column was not successful. cascadevarfail returns an integer value. If the return value is nonzero, the cascading process will be omitted for the remaining variables during the current SLP iteration, but the optimization will continue.
cbprob | The problem passed to the callback function.
cbdata | The user-defined object passed as data to XSLPsetcbcascadevarfail.
col | The number of the column which has been cascaded.
data | Address of a user-defined object, which can be used for any purpose by the function. data is passed to cascadevarfail as cbdata.

Further information
This callback can be used to provide user defined updates for SLP variables having a determining row that were not successfully cascaded due to the determining row being close to singular around the current values. This callback will always be called in place of the cascadevar callback in such cases, and in no situation will both the cascadevar and the cascadevarfail callback be called in the same iteration for the same variable.
Related topics
XSLPcascade, XSLPsetcbcascadeend, XSLPsetcbcascadestart, XSLPsetcbcascadevar
Parent Topic Library functions and the programming interface

© 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.