The KBESTS parameter is used to set the number of solutions desired as part of the K-Best solutions feature of LINGO's mixed integer solver.  Whenever this value is greater than 1, say K, LINGO will return up to K unique solutions to the model.  These solutions will have the property that they are the next best solutions available in terms of their objective values.  Less than K solutions may be returned if a sufficient number of feasible solutions do not exist.  Please refer to section K-Best Solutions Example for an example of the use of the K-Best feature.  The default value for this parameter is 1, meaning that LINGO will find only one solution to integer models, i.e, the K-Best feature is disabled by default.