[Bonmin-tickets] [Bonmin] #53: bonmin apparently not using Cplex even if told to

[Bonmin]

#53: bonmin apparently not using Cplex even if told to
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Reporter:  frangio  |      Owner:  pbonami
    Type:  defect   |     Status:  new
Priority:  major    |  Component:  Bonmin
 Version:  1.5      |   Keywords:
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 Hi.

 We built bonmin from the latest source, with the appropriate --with-
 cplex** options. Which, as far as I understand, worked because the
 libOsiCpx.* stuff have been duly produced:

 $ ls /usr/bonmin/lib/libOsiCpx.*
 /usr/bonmin/lib/libOsiCpx.a   /usr/bonmin/lib/libOsiCpx.so
 /usr/bonmin/lib/libOsiCpx.so.1.12.9
 /usr/bonmin/lib/libOsiCpx.la  /usr/bonmin/lib/libOsiCpx.so.1

 Nonetheless, bonmin does not seen to "acknowledge" Cplex:

 $ /usr/bonmin/bin/bonmin
 Bonmin 1.8.6 using Cbc 2.9.9 and Ipopt 3.12.8

 Indeed, when I solve some instance with B-OA, either ostensibly using
 Cplex with

 $ /usr/bonmin/bin/bonmin nlkp_100_5.nl bonmin.algorithm=B-OA
 bonmin.milp_solver=Cplex

 or not, with

 $ /usr/bonmin/bin/bonmin nlkp_100_5.nl bonmin.algorithm=B-OA

 I get basically the same result. I'm attaching one instance and two logs,
 but we have checked this on more. The logs show a bunch of lines like

 Cbc0031I 76 added rows had average density of 4

 showing Cbc at work, but there is no mention of Cplex doing anything.

 Is it us doing something wrong?

 Thanks.

 Antonio

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Ticket URL: <https://projects.coin-or.org/Bonmin/ticket/53>
Bonmin <http://projects.coin-or.org/Bonmin>
Basic Open-source Nonlinear Mixed INteger programming