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Date: Wed, 28 May 2014 05:41:23 -0700 (PDT)
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Subject: Unable to figure out ' invalid matrix input type -- ', u'1'
From: varun7rs@gmail.com
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Xref: csiph.com comp.lang.python:72157

Hello Everyone,=20

I am currently working on Cplex using Python API. I have a problem when I r=
un the code. I keep getting this error about the invalid matrix input but I=
'm not able to figure out what it is. I would be grateful if any of you cou=
ld help. My function is as below

def add_constraint(self, variables, coefficients, sense, rhs, name):
    self.prob.linear_constraints.add(
      lin_expr =3D [[ variables, coefficients ]],
      senses =3D    [sense],
      rhs =3D       [rhs],
      names =3D     [name] )



Traceback (most recent call last):
  File "RW10.py", line 569, in <module>
    main(sys.argv[1:])
  File "RW10.py", line 562, in main
    solveVNEProblem( phy_network, demands, args.output)
  File "RW10.py", line 116, in solveVNEProblem
    solver.add_constraint( varNames, varCoeffs, "E", 1.0, "Location_Constra=
ints1{}".format( demand.demandID ) )
  File "RW10.py", line 26, in add_constraint
    names =3D     [name] )
  File "/opt/ibm/ILOG/CPLEX_Studio125/cplex/python/x86-64_sles10_4.1/cplex/=
_internal/_subinterfaces.py", line 1187, in add
    rmat =3D _C_HBMatrix(lin_expr, self._cplex._env_lp_ptr, 0, self._env.pa=
rameters.read.apiencoding.get())
  File "/opt/ibm/ILOG/CPLEX_Studio125/cplex/python/x86-64_sles10_4.1/cplex/=
_internal/_matrices.py", line 74, in __init__
    raise TypeError(" invalid matrix input type -- ", self._mat[0])
TypeError: (' invalid matrix input type -- ', u'1')


Thank You