These are linear constraint attributes, meaning that they are
associated with specific linear constraints in the model. You should
use one of the various
get routines to retrieve the value of
an attribute. These are described at the beginning of
For the object-oriented interfaces, linear constraint attributes are
retrieved by invoking the
get method on a constraint object.
For attributes that can be modified directly by the user, you can use
one of the various
Attempting to query an attribute that is not available will produce an
error. In C, the attribute query routine will return a
GRB_ERROR_DATA_NOT_AVAILABLE error code. The object-oriented
interfaces will throw an exception.