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This repository has been archived by the owner on Mar 3, 2019. It is now read-only.
if (simplex->isProvenOptimal() == false) {
// error ...
}
which is triggered and dumps:
Quadratic Program Solver failed.
Problem: 2443 variables, 2310 rows.
Written problem to file "QP-CRASH.qps" for analysis.
problem sense: 1
STATUS: numerical difficulties: no
STATUS: primal infeasible: YES
STATUS: dual infeasible: no
STATUS: iteration limit reached: no
If I ignore the isProvenOptimal() check and try to obtain the objective using
then it is all-zero, which is not a feasible point.
I checked the dumped QPS file and solved the problem using BPMPD which solves it with objective 2310 (see attached output logfile).
Am I using the interface incorrectly or is this a bug in Clp? Also, if I want to disable any kind of presolve, is there a way to do this using the ClpSimplex? and ClpModel? interfaces? (In initialSolve I can pass a ClpSolve? object, but how to do this just by calling primal()?)
Thanks.
The text was updated successfully, but these errors were encountered:
Moved from TRAC as part of COIN fORgery: https://projects.coin-or.org/Clp/ticket/24
Using Clp trunk from 2008/09/15, I setup a QP problem as follows:
Clp produces the following output which seems to give the correct objective 2310:
However, I check, as I do for LP's, the following
which is triggered and dumps:
If I ignore the isProvenOptimal() check and try to obtain the objective using
then it is all-zero, which is not a feasible point.
I checked the dumped QPS file and solved the problem using BPMPD which solves it with objective 2310 (see attached output logfile).
Am I using the interface incorrectly or is this a bug in Clp? Also, if I want to disable any kind of presolve, is there a way to do this using the ClpSimplex? and ClpModel? interfaces? (In initialSolve I can pass a ClpSolve? object, but how to do this just by calling primal()?)
Thanks.
The text was updated successfully, but these errors were encountered: