Location in the JCL

The JOBLIB DD statement must immediately follow the JOB statement and any JES statements. There must be no intervening EXEC or other DD statements between the JOBLIB DD statement and the JOB statement.
If libraries are concatenated to the JOBLIB library, the concatenated DD statements must immediately follow the JOBLIB DD statement.
Do not include a JOBLIB DD statement in an in-stream or cataloged procedure.