  We reexamine the production of J/Psi and other charmonium states for a
variety of target-projectile choices at the SPS, in particular for the
interesting comparison between S+U at 200 GeV/c and Pb+Pb at 158 GeV/c as
observed in the experiments NA38 and NA50 respectively. The result is a
description of the NA38 and NA50 data in terms of a conventional,
quasi-hadronic picture. The apparently anomalous suppression found in the most
massive Pb+Pb system arises in the present simulation from three sources:
destruction in the initial nucleon-nucleon cascade phase, use of coupled
channels to exploit the larger breakup in the less bound Chi and Psi' states,
and comover interaction in the final low energy phase.
