| Overview | Group | Index | Concepts | 
The routine CPXgetsosindex searches for the index number
 of the specified special ordered set in a CPLEX problem object.
Example
status = CPXgetsosindex (env, lp, "set5", &setindex);
| env | A pointer to the CPLEX environment as returned by   | 
| lp | A pointer to a CPLEX problem object as returned by   | 
| lname_str | A special ordered set name to search for.  | 
| index_p | A pointer to an integer to hold the index number of the special ordered set with name   |