From ee88a2964da94a72a754d7e9fe2c564f0eb9a203 Mon Sep 17 00:00:00 2001
From: Stuart Mitchell <stu@stuartmitchell.com>
Date: Tue, 17 Mar 2015 23:57:58 +1300
Subject: [PATCH] fix for dummy issue again

---
 .travis.yml      | 2 +-
 src/pulp/pulp.py | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 56e36c2..57a5162 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,7 @@ python:
   - "pypy"
 before_install: 
  - sudo apt-get update -qq
- - sudo apt-get install -qq glpk
+ - sudo apt-get install -qq glpk python-glpk
   #- pip install glpk
   #- sudo apt-get install coinor-cbc
 # command to install dependencies
diff --git a/src/pulp/pulp.py b/src/pulp/pulp.py
index de2c2c6..2e46f9c 100644
--- a/src/pulp/pulp.py
+++ b/src/pulp/pulp.py
@@ -1502,7 +1502,7 @@ class LpProblem(object):
                 dummyVar = self.get_dummyVar()
                 constraint += dummyVar
                 #set this dummyvar to zero so infeasible problems are not made feasible
-                f.write((dummyVar == 0.0).asCplexLpConstraint(k))
+                f.write((dummyVar == 0.0).asCplexLpConstraint("_dummy"))
             f.write(constraint.asCplexLpConstraint(k))
         vs = self.variables()
         # check if any names are longer than 100 characters