[Zope-DB] warning: couldn't find real module for class dco2.

[Orr, Steve]

I run pychecker on a script that imports DCOracle2 and I get lots of
warnings like the following:
warning: couldn't find real module for class dco2.OperationalError
(module name: dco2)
warning: couldn't find real module for class dco2.ProgrammingError
(module name: dco2)
warning: couldn't find real module for class dco2.Warning (module name:
dco2)

What does this mean? Do I have an install problem? (Python 2.2.2
DCOracle 1.3)