The initial values you provide for the variables in a model can affect the "path" LINGO takes to the solution. Starting with values close to the optimal solution can noticeably reduce the solution time. In many situations, you may not know "good" initial values. However, when you do know reasonable ones, it may be to your benefit to use them in the INIT section.

Consider changing your supplied initial values and re-solving the model if you suspect: 1) there is an answer better than the answer returned by LINGO, or, 2) a feasible solution exists even though LINGO returns the message "No feasible solution found".