Joined: 25 Jan 2004 Posts: 160 Location: Toronto, Canada
Type Qw JESDS in your mainframe (if you have quick reference).
JESDS is only used for jobs that actually complete execution, and
not for jobs that are executing when MVS fails, or for jobs that
contain a TYPRUN=COPY or TYPRUN=SCAN parameter on the JOB statement,
or for jobs that suffer a JCL error.
Note: In a JES3 environment, a job can complete processing before all
of its messages have been written to the job log. When this
occurs, the job's output is incomplete. For this reason, do not
use the contents of the job log as an automation or as a
If an OUTPUT JCL statement contains both JESDS and CLASS parameters, the
CLASS parameter will override the MSGCLASS parameter on the JOB
statement for the specified JES data sets.