[Cbc-tickets] [COIN-OR Branch-and-Cut MIP Solver] #183: Semis section not working as expected.

[COIN-OR Branch-and-Cut MIP Solver]

#183: Semis section not working as expected.
-----------------------+-------------------
Reporter:  richiarora  |      Owner:  tkr
    Type:  defect      |     Status:  new
Priority:  major       |  Component:  Cbc
 Version:  2.9.8       |   Keywords:  semis
-----------------------+-------------------
 Hi

 I am using version 2.9.9 of cbc in ubuntu 17.10 docker image.
 My test.lp file has following content:

 {{{
 Maximize
  obj: x1 + 2 x2 + 3 x3 + x4
 Subject To
  c1: - x1 + x2 + x3 + 10 x4 <= 20
  c2: x1 - 3 x2 + x3 <= 30
  c3: x2 - 3.5 x4 = 0
 Bounds
  0 <= x1 <= 40
  2 <= x4 <= 3
 General
  x4
 Semis
  x1 x2 x3
 }}}


 When trying with semis section i get error
 "terminate called after throwing an instance of 'CoinError'
 Aborted"

 on mac i get:
 libc++abi.dylib: terminating with uncaught exception of type CoinError
 Abort trap: 6

 However if I comment out Semis it works fine.
 I was hoping that Semis are supported.
 Am I doing something wrong?

 My command is : cbc -presolve on -import test.lp solve solu out.txt

 On further analysis i found out when in cbc prompt i type "import test.lp"
 it fails and shows same error is

 Thanks

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Ticket URL: <https://projects.coin-or.org/Cbc/ticket/183>
COIN-OR Branch-and-Cut MIP Solver <http://projects.coin-or.org/Cbc>
An LP-based branch-and-cut MIP solver.