Upper limit of D{sup 0} production in central Pb-Pb collisions at 158A GeV

Results are presented from a search for the decays D{sup 0}{yields}K{sup -}{pi}{sup +} and D{sup 0}{yields}K{sup +}{pi}{sup -} in a sample of 3.8x10{sup 6} central Pb-Pb events collected with a beam energy of 158A GeV by NA49 at the CERN SPS. No signal is observed. An upper limit on D{sup 0} production is derived and compared to predictions from several models.