Also check if you are using CURRENT RULES = 'STD'. This affects
the SQL errors that Db2 returns. For example, if there is a typo in
the table name, Db2 issues a -551 instead of a more meaningful
error (in this case -204). This can be a little confusing because
the problem has nothing to do with missing authorization, even if
the error message suggests that.
You can simply execute SELECT CURRENT RULES FROM
SYSIBM.SYSDUMMY1 to check, it will return either 'STD' or
Fast, efficient Db2 z/OS data migrations and renewals.