[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      |  Resolution:
Keywords:           |
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Comment (by stefan):

 Replying to [ticket:53 frangio]:
 > 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

 I think it only states a "random set" of dependencies here.


 > 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?


 With the options file
 {{{
 bonmin.algorithm B-OA
 milp_solver cplex
 bonmin.milp_log_level 1
 }}}
 I can see some CPLEX output.
 I'm never sure when to use the {{{bonmin.}}} prefix in the option names,
 but here it seems that it should be omitted.

 I only tried a current Bonmin version, but it might still apply to 1.5,
 too.

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Ticket URL: <https://projects.coin-or.org/Bonmin/ticket/53#comment:1>
Bonmin <http://projects.coin-or.org/Bonmin>
Basic Open-source Nonlinear Mixed INteger programming