2 IMPROVE
  Syntax: IMPROVE nloop
   where: nloop  is the number of tries to make
                 (default = number of variables)

  Tries to improve the  current fit. Be careful  that your parameters do
  not go  wild  using  this  routine.  It has a  nasty  habit  of giving
  floating overflows, so you should  protect your function against going
  negative, by setting limits on parameters if necessary.

