The BCROSS parameter controls whether or not the barrier solver performs a basis crossover on linear programs.  Barrier solvers do not normally return basic solutions.  For example, if alternate optima exist, the barrier method will return a solution that is, loosely speaking, the "average" of all alternate optima.  The basis crossover process converts a non-basic barrier solver solution to a basic (i.e., corner point) solution.  The available choices are: 0 for no crossover and 1 (the default) to perform a crossover.