DFS0940I {PSB | DBD} (psbname | dbdname) HAS BEEN {ADDED | REPLACED} IN LIBRARY. {PSB SIZE | DMB} SIZE = xxxxxx BYTES

Explanation

The named PSB or DBD has been modified in the ACB library. If it did not exist, it has been added. If it did exist, it has been replaced. The size of the member is as indicated.