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<div class="moz-cite-prefix">Should be fixed if you get a new copy
of OsiPresolve.cpp using svn.<br>
<br>
On 09/09/17 20:48, James Howey wrote:<br>
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<p class="MsoNormal">Windows x64 visual c++ debug build cbc
2.9.9<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">command line - cbc TaxerFailure.lp solve
solu taxerFailure.txt (default strategy 1)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">results in:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Assertion failed: status !=
CoinWarmStartBasis::atLowerBound ||
originalModel_->getColLower()[i] >
-originalModel_->getInfinity(), file
..\..\..\src\Osi\OsiPresolve.cpp, line 504<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">After apparently coming to optimum
solution.<span style="color:#1F497D"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">The same result
occurs with an equivalent mps model.</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Runs to completion with correct optimum
in release build <span style="color:#1F497D"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal">The nearly identical model TaxerSuccess.lp
differs in 7 lines and finishes successfully.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks for any
attention you might be able to spare to this matter.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">jkh<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">C:\Users\jhowey\Google
Drive\wealth\cbcdll\Cbc-2.9.9\Cbc\MSVisualStudio\v10\x64-v141-Debug>cbc
TaxerFailure.lp solve solu taxerFailure.txt<o:p></o:p></p>
<p class="MsoNormal">Welcome to the CBC MILP Solver<o:p></o:p></p>
<p class="MsoNormal">Version: 2.9.9<o:p></o:p></p>
<p class="MsoNormal">Build Date: Sep 4 2017<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">command line - cbc TaxerFailure.lp solve
solu taxerFailure.txt (default strategy 1)<o:p></o:p></p>
<p class="MsoNormal">CoinLpIO::readLp(): Maximization problem
reformulated as minimization<o:p></o:p></p>
<p class="MsoNormal">Continuous objective value is -10198 - 0.00
seconds<o:p></o:p></p>
<p class="MsoNormal">Cgl0003I 0 fixed, 0 tightened bounds, 5
strengthened rows, 0 substitutions<o:p></o:p></p>
<p class="MsoNormal">Cgl0003I 0 fixed, 0 tightened bounds, 1
strengthened rows, 0 substitutions<o:p></o:p></p>
<p class="MsoNormal">Cgl0004I processed model has 18 rows, 24
columns (5 integer (5 of which binary)) and 64 elements<o:p></o:p></p>
<p class="MsoNormal">Cbc0038I Initial state - 0 integers
unsatisfied sum - 0<o:p></o:p></p>
<p class="MsoNormal">Cbc0038I Solution found of -10198<o:p></o:p></p>
<p class="MsoNormal">Cbc0038I Relaxing continuous gives -10198<o:p></o:p></p>
<p class="MsoNormal">Cbc0038I Before mini branch and bound, 5
integers at bound fixed and 17 continuous<o:p></o:p></p>
<p class="MsoNormal">Cbc0038I Mini branch and bound did not
improve solution (0.03 seconds)<o:p></o:p></p>
<p class="MsoNormal">Cbc0038I After 0.03 seconds - Feasibility
pump exiting with objective of -10198 - took 0.00 seconds<o:p></o:p></p>
<p class="MsoNormal">Cbc0012I Integer solution of -10198.02
found by feasibility pump after 0 iterations and 0 nodes (0.03
seconds)<o:p></o:p></p>
<p class="MsoNormal">Cbc0001I Search completed - best objective
-10198.0198019802, took 0 iterations and 0 nodes (0.03
seconds)<o:p></o:p></p>
<p class="MsoNormal">Cbc0035I Maximum depth 0, 0 variables fixed
on reduced cost<o:p></o:p></p>
<p class="MsoNormal">Cuts at root node changed objective from
-10198 to -10198<o:p></o:p></p>
<p class="MsoNormal">Probing was tried 0 times and created 0
cuts of which 0 were active after adding rounds of cuts (0.000
seconds)<o:p></o:p></p>
<p class="MsoNormal">Gomory was tried 0 times and created 0 cuts
of which 0 were active after adding rounds of cuts (0.000
seconds)<o:p></o:p></p>
<p class="MsoNormal">Knapsack was tried 0 times and created 0
cuts of which 0 were active after adding rounds of cuts (0.000
seconds)<o:p></o:p></p>
<p class="MsoNormal">Clique was tried 0 times and created 0 cuts
of which 0 were active after adding rounds of cuts (0.000
seconds)<o:p></o:p></p>
<p class="MsoNormal">MixedIntegerRounding2 was tried 0 times and
created 0 cuts of which 0 were active after adding rounds of
cuts (0.000 seconds)<o:p></o:p></p>
<p class="MsoNormal">FlowCover was tried 0 times and created 0
cuts of which 0 were active after adding rounds of cuts (0.000
seconds)<o:p></o:p></p>
<p class="MsoNormal">TwoMirCuts was tried 0 times and created 0
cuts of which 0 were active after adding rounds of cuts (0.000
seconds)<o:p></o:p></p>
<p class="MsoNormal">Assertion failed: status !=
CoinWarmStartBasis::atLowerBound ||
originalModel_->getColLower()[i] >
-originalModel_->getInfinity(), file
..\..\..\src\Osi\OsiPresolve.cpp, line 504<o:p></o:p></p>
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