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Empty constraint matrix kills Cbc #8

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IainNZ opened this issue Nov 12, 2013 · 4 comments
Closed

Empty constraint matrix kills Cbc #8

IainNZ opened this issue Nov 12, 2013 · 4 comments

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@IainNZ
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IainNZ commented Nov 12, 2013 

using JuMP
m = Model()
@defVar(m, x, Bin)
@setObjective(m, Max, 1x)
solve(m)

ERROR: Internal error in CoinLoadMatrix
 in LoadMatrix at /home/idunning/.julia/Cbc/src/CoinMPInterface.jl:60
 in loadproblem! at /home/idunning/.julia/Cbc/src/CbcSolverInterface.jl:57
 in solveMIP at /home/idunning/.julia/JuMP/src/solvers.jl:218
 in solve at /home/idunning/.julia/JuMP/src/solvers.jl:18
@IainNZ
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IainNZ commented Nov 12, 2013

@mlubin it doesn't kill Clp though

@mlubin
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mlubin commented Nov 12, 2013

Looks like a CoinMP issue.

@IainNZ
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IainNZ commented Nov 12, 2013

Hack around it by making an empty constraint?

@mlubin mlubin closed this as completed in a5cd0c5 Nov 12, 2013
@mlubin
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mlubin commented Nov 12, 2013

Had to patch CoinMP, so you'll need to rebuild.

@mlubin mlubin mentioned this issue Nov 12, 2013
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@joehuchette joehuchette mentioned this issue Jun 19, 2014
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@IainNZ @mlubin