Held classes in a JES3 system

If CLASS specifies a class-name that is defined to JES3 as a held class for the output service hold queue (Q=HOLD), all of the new output characteristics might not be included in the data set on the writer queue when (1) the data set is moved from the hold queue to the output service writer queue (Q=WTR), (2) the data set includes an OUTPUT JCL statement, and (3) the NQ= or NCL= keyword is used.

For more information, see z/OS JES3 Initialization and Tuning Guide.