We're encountering a problem where a class definition is not available some times, and we can't figure out why.

I'm guessing that the SET CLASSLIB is getting reset somehow, but I'm not sure of all the ways a CLASSLIB can be lost.

I know about SET CLASSLIB TO and RELEASE CLASSLIB, and those causes have been ruled out; what other ways are there to lose a class def or CLASSLIB setting?

-- jas