XpressProblem.CallbackAPI.UserSolNotifyCallback Delegate

public delegate void UserSolNotifyCallback(
	XpressProblem cbprob,
	string solname,
	int status
)

Parameters

cbprob   XpressProblem

The problem passed to the callback function, usersolnotify.

solname   String

The string name assigned to the solution when it was loaded into the Optimizer using addMipSol.

status   Int32

One of the following status values:///

• 1: Solution is feasible. (XPRS_USERSOLSTATUS_ACCEPTED_FEASIBLE)
///
• 2: Solution is feasible after reoptimizing with fixed MIP entities. (XPRS_USERSOLSTATUS_ACCEPTED_OPTIMIZED)
///
• 3: A local search heuristic was applied and a feasible solution discovered. (XPRS_USERSOLSTATUS_SEARCHED_SOL)
///
• 4: A local search heuristic was applied but a feasible solution was not found. (XPRS_USERSOLSTATUS_SEARCHED_NOSOL)
///
• 5: Solution is infeasible and a local search could not be applied. (XPRS_USERSOLSTATUS_REJECTED_INFEAS_NOSEARCH)
///
• 6: Solution is partial and a local search could not be applied. (XPRS_USERSOLSTATUS_REJECTED_PARTIAL_NOSEARCH)
///
• 7: Failed to reoptimize the problem with MIP entities fixed to the provided solution. Likely because a time or iteration limit was reached. (XPRS_USERSOLSTATUS_REJECTED_FAILED_OPTIMIZE)
///
• 8: Solution is dropped. This can happen if the MIP problem is changed or solved to completion before the solution could be processed. (XPRS_USERSOLSTATUS_DROPPED)
///
• 9: The solution is worse than the current MIP cutoff value. (XPRS_USERSOLSTATUS_REJECTED_CUTOFF)
///

Reference

Other Resources