I've seen this for a while and well after the fixes mentioned. It has no real effect on DIP as far as I can tell. But, I'll investigate when I have time.<div><br></div><div><br><br><div class="gmail_quote">On Wed, Jan 26, 2011 at 3:18 PM, Ted Ralphs <span dir="ltr"><<a href="mailto:ted@lehigh.edu">ted@lehigh.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">We've seen messages like this with CPLEX for a long time in many<br>
contexts (not just DIP). Unlike most other solvers, CPLEX makes a very<br>
strong distinction between an LP and a MIP. Although conceptually, the<br>
only difference is whether there exist variables that are marked as<br>
integer type or not, CPLEX takes the "problem type," as set by the<br>
user, as strongly dictating what can and cannot be done when<br>
manipulating the model. CPLEX also erases all solution information<br>
when switching problem type. The use of Cgl actually requires the<br>
problem type to be switched back and forth and this causes problems. I<br>
thought we had actually fixed all of these problems over time, so if<br>
you are seeing this error now, it should be an indication of a true<br>
problem.<br>
<br>
Ted<br>
<div><div></div><div class="h5"><br>
On Wed, Jan 26, 2011 at 1:49 PM, Matthew Galati<br>
<<a href="mailto:matthew.galati@gmail.com">matthew.galati@gmail.com</a>> wrote:<br>
> I know about it.... it doesn't seem to effect anything - except that it is<br>
> annoying.<br>
><br>
> It is on my ToDo list to investigate why that message appears. I think it<br>
> has something to do with the odd design of OsiCpx.<br>
><br>
><br>
><br>
> On Wed, Jan 26, 2011 at 1:46 PM, kim <<a href="mailto:kim@hamilton-vejlin.dk">kim@hamilton-vejlin.dk</a>> wrote:<br>
>><br>
>> I just set up DIP to use CPLEX instead of CBC and it works well but I am<br>
>> getting some odd messages at the beginning of the program run.<br>
>><br>
>> As one of the first things I get a string of messages all saying:<br>
>> "CPX0000 CPLEX Error 3003: Not a mixed-integer problem."<br>
>><br>
>> This happens before the search is actually started and there is always<br>
>> one "error 3003" for each block. It doesn't seem to have an effect at<br>
>> all and the program behaves as expected, but it seems odd.<br>
>><br>
>> Does anyone have in idea what those messages are about and if I should<br>
>> see it as a sign I have not set up the DIP/CPLEX combination correctly?<br>
>><br>
>> -Kim<br>
>><br>
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><br>
><br>
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<br>
<br>
<br>
</div></div><font color="#888888">--<br>
Dr. Ted Ralphs<br>
Associate Professor, Lehigh University<br>
(610) 628-1280<br>
ted 'at' lehigh 'dot' edu<br>
<a href="http://coral.ie.lehigh.edu/~ted" target="_blank">coral.ie.lehigh.edu/~ted</a><br>
</font></blockquote></div><br></div>