I am trying to use one Gurobi attribute (UnbdRay, https://www.gurobi.com/documentation/8.1/refman/unbdray.html#attr:UnbdRay) but I am unable to find the macro to be used in Gurobi.
Below is an example I am trying to use
Now I am trying below macros to get unbound ray
below is the error
ERROR: UndefVarError: getUnbdRay not defined
Can anyone please help me how to call the attributes of Gurobi in Julia.