[Coin-lpsolver] Segmentation faults
svoboda at fi.muni.cz
svoboda at fi.muni.cz
Tue Mar 1 09:59:05 EST 2005
Hello,
I'm a beginner in using COIN-Cbc. I have to admit, that I know linear
programming techniques whereas integer programming (the cuts etc.) is more
difficult for me. I used some sample?.cpp files from Cbc to experiment
with my data. Everything worked OK until I tested CutGenerators. Namely
CglProbing, CglGomory and CglOddHole which cause "segmentation fault" in
my programs. I do not know how to set the right options for these
generators to avoid the mentioned problems. I do not know the meaning for
"set" methods - therefore I do not know how to set the right values.
Here is the part of the code, I'd like to set properly:
CglProbing probingGen;
probingGen.setUsingObjective (true);
probingGen.setMaxPass (3);
probingGen.setMaxProbe (100);
probingGen.setMaxLook (numberOfCols);
probingGen.setRowCuts (3);
CglGomory gomoryGen;
gomoryGen.setLimit (numberOfCols);
CglOddHole oddholeGen;
oddholeGen.setMinimumViolation (0.005);
oddholeGen.setMinimumViolationPer (0.00002);
oddholeGen.setMaximumEntries (numberOfCols);
model.addCutGenerator (&probingGen, -1, "Probing");
model.addCutGenerator (&gomoryGen, -1, "Gomory");
model.addCutGenerator (&oddholeGen, -1, "OddHole");
As for my integer linear programming problem, there are:
- M rows
- N columns
- the values of individual variables are all set to "0" or "1"
With regards
David
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