  The covariant density functional theory with the point-coupling interaction
PC-PK1 is compared with new and accurate experimental masses in the element
range from 50 to 91. The experimental data are from a mass measurement
performed with the storage ring mass spectrometry at GSI [Chen et al., Nucl.
Phys. A 882, 71 (2012)]. Although the microscopic theory contains only 11
parameters, it agrees well with the experimental data. The comparison is
characterized by a rms deviation of 0.859 MeV. For even-even nuclei, the theory
agrees within about 600 keV. Larger deviations are observed in this comparison
for the odd-A and odd-odd nuclei. Improvements and possible reasons for the
deviations are discussed in this contribution as well.
