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Hi all,</div>
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<br>
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I am getting the following warning:</div>
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<div class="ContentPasted0"> t<span style="font-family: "Courier New", monospace; font-size: 9pt;">ime | node | left |LP iter|LP it/n|mem/heur|mdpt |vars |cons |rows |cuts |sepa|confs|strbr| dualbound | primalbound | gap | compl.
</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;"> 0.0s| 1 | 0 | 39 | - | 1118k | 0 | 20 | 36 | 63 | 30 | 31 | 1 | 0 |-1.804449e+02 | 0.000000e+00*| Inf | unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;"> 0.0s| 1 | 0 | 40 | - | 1118k | 0 | 20 | 36 | 64 | 31 | 32 | 1 | 0 |-1.802198e+02 | 0.000000e+00*| Inf | unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;"> 0.0s| 1 | 0 | 41 | - | 1124k | 0 | 20 | 36 | 65 | 32 | 33 | 1 | 0 |-1.801160e+02 | 0.000000e+00*| Inf | unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;"> 0.1s| 1 | 2 | 41 | - | 1128k | 0 | 20 | 36 | 65 | 32 | 34 | 1 | 15 |-1.800907e+02 | 0.000000e+00*| Inf | unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;">r 0.1s| 15 | 14 | 57 | 1.1 |rounding| 14 | 20 | 36 | 65 | 33 | 0 | 1 | 42 |-1.758398e+02 |-1.151438e+01 |1427.13%| unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;">r 0.1s| 16 | 15 | 65 | 1.6 |rounding| 15 | 20 | 36 | 65 | 33 | 0 | 1 | 45 |-1.758398e+02 |-1.604484e+01 | 995.93%| unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;">* 0.1s| 17 | 14 | 66 | 1.6 | LP | 16 | 20 | 36 | 65 | 33 | 1 | 1 | 45 |-1.758398e+02 |-2.039660e+01 | 762.10%| unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;">r 0.1s| 24 | 17 | 78 | 1.6 |rounding| 16 | 20 | 36 | 66 | 35 | 0 | 1 | 50 |-1.758398e+02 |-2.640592e+01 | 565.91%| unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;">* 0.1s| 34 | 21 | 95 | 1.6 | LP | 17 | 20 | 36 | 69 | 39 | 1 | 1 | 54 |-1.758398e+02 |-2.719577e+01 | 546.57%| unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;">* 0.1s| 37 | 22 | 99 | 1.6 | LP | 18 | 20 | 36 | 70 | 40 | 1 | 1 | 54 |-1.758398e+02 |-6.270300e+01 | 180.43%| unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;">r 0.2s| 57 | 30 | 144 | 1.8 |rounding| 18 | 20 | 36 | 72 | 54 | 1 | 1 | 61 |-1.758398e+02 |-6.485425e+01 | 171.13%| unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;"> 0.2s| 100 | 63 | 235 | 2.0 | 1345k | 18 | 20 | 36 | 69 | 73 | 2 | 1 | 69 |-1.758398e+02 |-6.485425e+01 | 171.13%| unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;"> 0.3s| 200 | 159 | 480 | 2.2 | 1845k | 18 | 20 | 36 | 71 | 149 | 2 | 1 | 71 |-1.758398e+02 |-6.485425e+01 | 171.13%| unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;">WARNING: Dual bound 69.0721 is larger than the objective of the primal solution 68.1511. The solution might not be optimal.</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;"> 0.5s| 300 | 253 | 758 | 2.4 | 2248k | 18 | 20 | 36 | 76 | 226 | 1 | 1 | 71 |-1.758398e+02 |-6.485425e+01 | 171.13%| unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;"> 0.6s| 400 | 351 | 1029 | 2.5 | 2670k | 18 | 20 | 36 | 73 | 312 | 1 | 1 | 71 |-1.758398e+02 |-6.485425e+01 | 171.13%| unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;"> time | node | left |LP iter|LP it/n|mem/heur|mdpt |vars |cons |rows |cuts |sepa|confs|strbr| dualbound | primalbound | gap | compl.
</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;"> 0.7s| 500 | 443 | 1254 | 2.4 | 2799k | 18 | 20 | 36 | 70 | 367 | 1 | 1 | 71 |-1.758398e+02 |-6.485425e+01 | 171.13%| unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;"> 0.8s| 600 | 537 | 1467 | 2.4 | 3062k | 18 | 20 | 36 | 70 | 411 | 1 | 3 | 71 |-1.758398e+02 |-6.485425e+01 | 171.13%| unknown</span></div>
<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;"> 1.0s| 700 | 633 | 1696 | 2.4 | 3247k | 18 | 20 | 36 | 70 | 470 | 1 | 3 | 71 |-1.758398e+02 |-6.485425e+01 | 171.13%| unknown</span></div>
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<div class="ContentPasted0"><span style="font-family: "Courier New", monospace; font-size: 9pt;">SCIP Status : solving was interrupted [time limit reached]</span></div>
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The solutions I am getting are fine and I have no obvious errors, but I am curious as to what might have generated the warning. Perhaps it comes from some subscip run by a heuristic since the dual bound the warning mentions (69.0721) is some distance from that
of the main problem ( -1.758398e+02). Can anyone explain what might be happening here; perhaps this indicates some problem I have not yet noticed.</div>
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James<br>
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James Cussens</div>
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Room MVB 3.26<br>
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Dept of Computer Science, University of Bristol</div>
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Phone: +44 (0)117 455 8723<br>
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<a href="https://jcussens.github.io/">https://jcussens.github.io/</a></div>
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<span style="font-size:11.5pt">Funded PhDs available in Bristol in the following areas: <a href="http://www.bristol.ac.uk/cdt/compass/" target="_blank" rel="noopener noreferrer"><span>Data Science</span></a>, <a href="http://www.bristol.ac.uk/cdt/interactive-ai/" target="_blank" rel="noopener noreferrer"><span>Interactive
AI</span></a>, <a href="http://www.bristol.ac.uk/cdt/cyber-security/" target="_blank" rel="noopener noreferrer"><span>Cyber Security</span></a> or <a href="http://www.bristol.ac.uk/cdt/digital-health/" target="_blank" rel="noopener noreferrer"><span>Digital
Health</span></a>. </span><br>
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