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<div class="moz-cite-prefix">Yves,<br>
<br>
If there are no continuous variables - this is a bug.<br>
<br>
Assuming there are -<br>
<br>
The idea is to use the solution from one problem for a different
problem. Initially the code fixes the continuous variables as
well as integer variables to try and keep as much information as
possible. Looking at the code, I see that if a variable is not
mentioned then it will be fixed to zero! This means that the
solution with all variables fixed will very likely be infeasible.
Even if all variables are in file then it is still possible that,
due to printing inaccuracy and/or different bases giving slightly
different values for continuous variables, it is possible for the
problem with all variables fixed to be slightly infeasible. If
this happens you get those messages.<br>
<br>
At least I should change code to set unmentioned variables to
bound nearest zero. It might be better to set the values to
infinity to indicate not set and then be more sensible when the
new solution is generated.<br>
<br>
John<br>
On 17/02/15 11:27, Yves Touchard wrote:<br>
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<blockquote cite="mid:54E325A7.5090906@dxo.com" type="cite">
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<font size="-1">Hello,<br>
<br>
Just a simple question (surely stupid...).<br>
The solver generates an integer solution file from a very basic
constraint file.<br>
Then I re-compile the same constraint file with the previous
solution file as mipsart argument. And cbc claims:<br>
<br>
[...]<br>
<i>will open mipstart file ./bug_gen.sol.</i><i><br>
</i><i>mipstart values read for 3 variables.</i><i><br>
[...]<br>
</i><big><i><small>Cbc0045I Warning: mipstart values could not
be used to build a solution.</small><br>
<small>Cbc0045I Trying just fixing integer variables.<br>
Cbc0045I mipstart provided solution with cost 127.464<br>
[..]</small><br>
<br>
</i><small>What does mean the warning?<br>
Is there something i miss.<br>
<br>
Thanks<br>
<br>
Yves<br>
</small></big><br>
</font><br>
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