Originally posted by: gravistar

Hi,

I've been trying to use C++ concert technology with the 64-bit version on ubuntu.

I've been trying to display the solution for the following basic LP problem.

#include <ilcp/cp.h>   

int nNodes = 22;   

int main(

int , 

const 

char * [])
{ IloEnv env;   

try 
{ IloModel model(env);   IloNumVarArray vars(env);   

for(

int i=0; i<nNodes; i++) vars.add(IloNumVar(env,0.0,1.0));   IloExpr objective(env);   

for(

int i=0; i<nNodes; i++) objective += vars[i];   model.add(IloMaximize(env, objective));   IloCP cp(model);   

if (cp.solve()) 
{ cp.out() << std::endl << cp.getStatus() << 
" Solution" << std::endl; IloNumArray vals(env); cp.getValues(vars, vals); cp.out() << std::endl << vals << std::endl; 
} 
} 

catch (IloException& ex) 
{ env.out() << 
"Error: " << ex << std::endl; 
} env.end(); 

return 0; 
}

However, I get this output:

IBM ILOG CPLEX Optimization Studio Preview Edition good 

for 86 more days ! ---------------------------------------------------------------------------- ! Maximization problem - 0 variables, 0 constraints ! Initial process time : 0.00s (0.00s extraction + 0.00s propagation) !  . Log search space  : 0.0 (before), 0.0 (after) !  . Memory usage      : 530.6 KB (before), 530.6 KB (after) ! Using sequential search. ! ---------------------------------------------------------------------------- !          Best Branches  Non-fixed            Branch decision * 21.9999999994       34 0.00s                      - ! ---------------------------------------------------------------------------- ! Search terminated normally, 1 solution found. ! Best objective         : 22 (optimal - effective tol. is 0.0022) ! Number of branches     : 72 ! Number of fails        : 34 ! Total memory usage     : 540.3 KB (530.6 KB CP Optimizer + 9.7 KB Concert) ! Time spent in solve    : 0.00s (0.00s engine + 0.00s extraction) ! Search speed (br. / s) : 7200.0 ! ---------------------------------------------------------------------------- Error: IloCP::getValue - variable is not fixed

#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

Since you are using the CP optimizer to solve your problem you should ask this question on the CP optimizer forum here. If you intend to use the CPLEX optimizer then use class IloCplex instead of class IloCP.
#CPLEXOptimizers
#DecisionOptimization