The HEUCUT, or heuristics cutoff criterion, option controls the criterion for terminating integer programming heuristics.  The possible settings for HEUCUT are:

Under the Time setting, LINGO terminates heuristics after a certain amount of elapsed time.  The Iterations option terminates heuristics after a certain number of iterations.  In general, the Time setting results in the fastest performance.  However, due to shifting computational loads on a machine, solution paths may change under the Time setting from one solve to the next, potentially resulting in non-reproducible solutions.  If reproducibility of a runs is a concern, then the Iterations option should be selected.  Under the Solver Decides setting, LINGO chooses the most appropriate strategy.

The default setting for HEUCUT is 1, Solver Decides.