Constants
The following list contains the set of constants needed by the Gurobi
.NET interface. You would refer to them using a GRB. prefix
(e.g., GRB.Status.OPTIMAL).
// Model status codes (after call to optimize())
public class Status
{
public const int LOADED = 1;
public const int OPTIMAL = 2;
public const int INFEASIBLE = 3;
public const int INF_OR_UNBD = 4;
public const int UNBOUNDED = 5;
public const int CUTOFF = 6;
public const int ITERATION_LIMIT = 7;
public const int NODE_LIMIT = 8;
public const int TIME_LIMIT = 9;
public const int SOLUTION_LIMIT = 10;
public const int INTERRUPTED = 11;
public const int NUMERIC = 12;
public const int SUBOPTIMAL = 13;
public const int INPROGRESS = 14;
public const int USER_OBJ_LIMIT = 15;
}
// Basis status info
public const int BASIC = 0;
public const int NONBASIC_LOWER = -1;
public const int NONBASIC_UPPER = -2;
public const int SUPERBASIC = -3;
// Constraint senses
public const char LESS_EQUAL = '<';
public const char GREATER_EQUAL = '>';
public const char EQUAL = '=';
// Variable types
public const char CONTINUOUS = 'C';
public const char BINARY = 'B';
public const char INTEGER = 'I';
public const char SEMICONT = 'S';
public const char SEMIINT = 'N';
// Objective sense
public const int MINIMIZE = 1;
public const int MAXIMIZE = -1;
// SOS types
public const int SOS_TYPE1 = 1;
public const int SOS_TYPE2 = 2;
// General constraint types
public const int GENCONSTR_MAX = 0;
public const int GENCONSTR_MIN = 1;
public const int GENCONSTR_ABS = 2;
public const int GENCONSTR_AND = 3;
public const int GENCONSTR_OR = 4;
public const int GENCONSTR_INDICATOR = 5;
// Numeric constants
public const double INFINITY = 1e100;
public const double UNDEFINED = 1e101;
// Limits
public const int MAX_STRLEN = 512;
// Callback constants
public class Callback
{
public const int POLLING = 0;
public const int PRESOLVE = 1;
public const int SIMPLEX = 2;
public const int MIP = 3;
public const int MIPSOL = 4;
public const int MIPNODE = 5;
public const int MESSAGE = 6;
public const int BARRIER = 7;
public const int PRE_COLDEL = 1000;
public const int PRE_ROWDEL = 1001;
public const int PRE_SENCHG = 1002;
public const int PRE_BNDCHG = 1003;
public const int PRE_COECHG = 1004;
public const int SPX_ITRCNT = 2000;
public const int SPX_OBJVAL = 2001;
public const int SPX_PRIMINF = 2002;
public const int SPX_DUALINF = 2003;
public const int SPX_ISPERT = 2004;
public const int MIP_OBJBST = 3000;
public const int MIP_OBJBND = 3001;
public const int MIP_NODCNT = 3002;
public const int MIP_SOLCNT = 3003;
public const int MIP_CUTCNT = 3004;
public const int MIP_NODLFT = 3005;
public const int MIP_ITRCNT = 3006;
public const int MIPSOL_SOL = 4001;
public const int MIPSOL_OBJ = 4002;
public const int MIPSOL_OBJBST = 4003;
public const int MIPSOL_OBJBND = 4004;
public const int MIPSOL_NODCNT = 4005;
public const int MIPSOL_SOLCNT = 4006;
public const int MIPNODE_STATUS = 5001;
public const int MIPNODE_REL = 5002;
public const int MIPNODE_OBJBST = 5003;
public const int MIPNODE_OBJBND = 5004;
public const int MIPNODE_NODCNT = 5005;
public const int MIPNODE_SOLCNT = 5006;
public const int BARRIER_ITRCNT = 7001;
public const int BARRIER_PRIMOBJ = 7002;
public const int BARRIER_DUALOBJ = 7003;
public const int BARRIER_PRIMINF = 7004;
public const int BARRIER_DUALINF = 7005;
public const int BARRIER_COMPL = 7006;
public const int MSG_STRING = 6001;
public const int RUNTIME = 6002;
}
// Errors
public class Error
{
public const int OUT_OF_MEMORY = 10001;
public const int NULL_ARGUMENT = 10002;
public const int INVALID_ARGUMENT = 10003;
public const int UNKNOWN_ATTRIBUTE = 10004;
public const int DATA_NOT_AVAILABLE = 10005;
public const int INDEX_OUT_OF_RANGE = 10006;
public const int UNKNOWN_PARAMETER = 10007;
public const int VALUE_OUT_OF_RANGE = 10008;
public const int NO_LICENSE = 10009;
public const int SIZE_LIMIT_EXCEEDED = 10010;
public const int CALLBACK = 10011;
public const int FILE_READ = 10012;
public const int FILE_WRITE = 10013;
public const int NUMERIC = 10014;
public const int IIS_NOT_INFEASIBLE = 10015;
public const int NOT_FOR_MIP = 10016;
public const int OPTIMIZATION_IN_PROGRESS = 10017;
public const int DUPLICATES = 10018;
public const int NODEFILE = 10019;
public const int Q_NOT_PSD = 10020;
public const int QCP_EQUALITY_CONSTRAINT = 10021;
public const int NETWORK = 10022;
public const int JOB_REJECTED = 10023;
public const int NOT_SUPPORTED = 10024;
public const int EXCEED_2B_NONZEROS = 10025;
public const int INVALID_PIECEWISE_OBJ = 10026;
public const int UPDATEMODE_CHANGE = 10027;
public const int CLOUD = 10028;
public const int MODEL_MODIFICATION = 10029;
public const int NOT_IN_MODEL = 20001;
public const int FAILED_TO_CREATE_MODEL = 20002;
public const int INTERNAL = 20003;
}
public const int METHOD_AUTO = -1;
public const int METHOD_PRIMAL = 0;
public const int METHOD_DUAL = 1;
public const int METHOD_BARRIER = 2;
public const int METHOD_CONCURRENT = 3;
public const int METHOD_DETERMINISTIC_CONCURRENT = 4;
public const int FEASRELAX_LINEAR = 0;
public const int FEASRELAX_QUADRATIC = 1;
public const int FEASRELAX_CARDINALITY = 2;
