Hyperon production in pp collisions

We report on a study of the proton induced hyperon production reactions. We discuss the theoretical efforts made towards understanding the existing da ta and the uncertainties involved in the calculations. Our recent calculati ons of the missing mass spectra for the pp --> K(+)Lambdap reaction which i nvolve a proper coupled channel treatment of the final state Ap interaction are presented. Significant differences in the results using different mode ls of the hyperon-nucleon interaction are found.