[Couenne] A message showed "couenne: Infeasible problem"

Ote Bao ote_ie at hotmail.com
Mon Oct 18 04:20:44 EDT 2010


Dear Sir,
	After I ran my model on Couenne.   A message showed that
-----------------------------------------------------	Error in an AMPL evaluation. Run with "halt_on_ampl_error yes" to see details.Exception of type: TOO_FEW_DOF in file "E:\stefan\nbBuildDir\Couenne\releases-0.3.2\Ipopt\src\Interfaces\IpIpoptApplication.cpp" at line 788: Exception message: status != TOO_FEW_DEGREES_OF_FREEDOM evaluated false: Too few degrees of freedom (rethrown)!TODO: No statistics available from Ipopt in Bonmin::IpoptSolver::IterationCountTODO: No statistics available from Ipopt in Bonmin::IpoptSolver::CPUTimeTODO: No statistics available from Ipopt in Bonmin::IpoptSolver::IterationCountTODO: No statistics available from Ipopt in Bonmin::IpoptSolver::CPUTimeTODO: No statistics available from Ipopt in Bonmin::IpoptSolver::IterationCountException of type: TOO_FEW_DOF in file "E:\stefan\nbBuildDir\Couenne\releases-0.3.2\Ipopt\src\Interfaces\IpIpoptApplication.cpp" at line 788: Exception message: status != TOO_FEW_DEGREES_OF_FREEDOM evaluated false: Too few degrees of freedom (rethrown)!TODO: No statistics available from Ipopt in Bonmin::IpoptSolver::IterationCountTODO: No statistics available from Ipopt in Bonmin::IpoptSolver::CPUTimeTODO: No statistics available from Ipopt in Bonmin::IpoptSolver::IterationCountTODO: No statistics available from Ipopt in Bonmin::IpoptSolver::CPUTimeTODO: No statistics available from Ipopt in Bonmin::IpoptSolver::IterationCountCbc0006I The LP relaxation is infeasible or too expensiveCbc0031I 4 added rows had average density of 2Cbc0013I At root node, 4 cuts changed objective from 30 to 30 in 2 passesCbc0014I Cut generator 0 (Couenne convexifier cuts) - 4 row cuts average 2.0 elements, 34 column cuts (38 active)Cbc0001I Search completed - best objective 1e+050, took 4 iterations and 0 nodes (24.80 seconds)Cbc0035I Maximum depth 0, 0 variables fixed on reduced cost Couenne convexifier cuts was tried 2 times and created 38 cuts of which 4 were active after adding rounds of cuts 	"Finished"
couenne: Infeasible problem		-----------------------------------------------------			After I read options section in couenne: a user’s manual. In 6.2(Linearization option) it said that...		– lp_solver (clp): the Linear Programming solver used to find lower bounds.By default, CLP is used, but the user can also specify cplex to use theCplex commercial software. In the latter case, the configure script has tobe (re-)run with the following options:--with-cplex-lib="/your/path/to/libcplex.a -lpthread"--with-cplex-incdir=/your/path/to/include/ilcplex			My computer platform is Window XP and also AMPL and CPLEX Version.11.1.0 installed.Could you please advise me?
Best Regards, Ote 		 	   		  
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