Multiple groups of “alldifferent” variables. (OptQuest Engine)

This message appears if your model includes more than one “alldifferent” constraint, which defines a group of integer variables that are required to be all different at the solution. The OptQuest Solver engine currently supports only one such group per problem. To use the OptQuest Solver, you must re-formulate your model so that only one “alldifferent” constraint is defined.