On occasion, due to round-off error, some of the values returned by LINGO’s solver will be very small (less than 1e-10). In reality, the true values of these variables are either zero or so small as to be of no consequence. These tiny values can be distracting when interpreting a solution report. The CUTOFF parameter can be used to suppress small solution values. Any solution value less-than-or-equal-to CUTOFF will be reported as being zero. The default value for CUTOFF is 1e-9.