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<p>Hi Peter,</p>
<p>thanks for reporting this problem, you did nothing wrong. For
fixing the issue you can try the attached patch. The problem will
probably also be fixed in the next (bugfix) release of SCIP.</p>
<p>Best,<br>
Robert<br>
</p>
<div class="moz-cite-prefix">On 2/1/19 3:25 PM, Purple Break wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAPERveYOfgFi_ZAcaxYPDoaVnjF50At-9PqBp+CCYhd7eorW3A@mail.gmail.com">
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<div><font face="monospace, monospace">Hi,</font></div>
<div><font face="monospace, monospace">I am using SCIP
6.0.1 on Linux.</font></div>
<div><font face="monospace, monospace">is it possible
to make use of warm starts when using
concurrentopt?</font></div>
<div><font face="monospace, monospace"><br>
</font></div>
<div><font face="monospace, monospace">Using the
interactive optimizer it seems to accept the
solution but then ignores it during solving:</font></div>
<div><font face="monospace, monospace"><br>
</font></div>
<div><font face="monospace, monospace">read problem
<x.lp><br>
</font></div>
<div><font face="monospace, monospace"><br>
</font></div>
<div><font face="monospace, monospace">primal solution
from solution file <x.sol> was accepted as
candidate, </font></div>
<div><font face="monospace, monospace">will be checked
when solving starts<br>
</font></div>
<div><font face="monospace, monospace"><br>
</font></div>
<div><font face="monospace, monospace">SCIP>
concurrentopt <br>
</font></div>
<div>
<div><font face="monospace, monospace">1/1 feasible
solution given by solution candidate storage,
new primal bound 2.288640e+06</font></div>
</div>
<div><font face="monospace, monospace"><br>
</font></div>
<div>
<div><font face="monospace, monospace">starting
solve in concurrent solver 'scip-7'</font></div>
<div><font face="monospace, monospace">starting
solve in concurrent solver 'scip-4'</font></div>
<div><font face="monospace, monospace">starting
solve in concurrent solver 'scip-6'</font></div>
<div><font face="monospace, monospace">starting
solve in concurrent solver 'scip-8'</font></div>
<div><font face="monospace, monospace">starting
solve in concurrent solver 'scip-3'</font></div>
<div><font face="monospace, monospace">starting
solve in concurrent solver 'scip-5'</font></div>
<div><font face="monospace, monospace">starting
solve in concurrent solver 'scip-2'</font></div>
<div><font face="monospace, monospace">starting
solve in concurrent solver 'scip-1'</font></div>
<div><font face="monospace, monospace"> time | mem
| dualbound | primalbound | gap </font></div>
<div><font face="monospace, monospace">$11.3s|3829M|
-- | 6.127008e+06 | Inf </font></div>
<div><font face="monospace, monospace"> 12.5s|3878M|
-- | 6.127008e+06 | Inf </font></div>
<div><font face="monospace, monospace"> 17.6s|4251M|
-- | 6.127008e+06 | Inf </font></div>
<div><font face="monospace, monospace"> 20.6s|4433M|
-- | 6.127008e+06 | Inf </font></div>
<div><font face="monospace, monospace"> 29.8s|4791M|
-- | 6.127008e+06 | Inf </font></div>
<div><font face="monospace, monospace"> 30.1s|4814M|
-- | 6.127008e+06 | Inf </font></div>
<div><font face="monospace, monospace">$1164s|6801M|
1.428576e+06 | 2.745312e+06 | 92.17%</font></div>
</div>
<div><font face="monospace, monospace"><br>
</font></div>
<div><font face="monospace, monospace">As you can see:
the 8 solvers are not using the primal bound </font><span
style="font-family:monospace,monospace">2.288640e+06</span></div>
<font face="monospace, monospace">
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</font></div>
Thanks,</font>
<div><font face="monospace, monospace">Peter</font></div>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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