>ANR8774W Volume D00710 not checked into library 3494LIB but is using
>category 400.
>
>What is category 400?

Bruce - The message description tells most of the story, but oddly doesn't
        advise the obvious: do 'Query LIBRary' and you should see your
defined category codes (with +1 for 3590).

  Richard Sims, BU