Cumulative CMFs for prestellar (cyan histogram and blue curve) and protostellar (pale green histogram and green curve) cores in W33-Main (in scenario A). The light green and cyan boxes around the fits are the uncertainties on the mass values. We represent the fit resulting from Salpeter value with a dashed purple line. The green box locates the seven ‘free-free uncertain’ cores and the four CO-contaminated cores. The vertical black segment shows the completeness limit (1.0 M_⊙).