Parameters

DDN=

Specifies the 1- to 8-character ddname associated with this data set or device. Up to 16 input data sets can be concatenated by specifying the same ddname on successive DYNALLOC statements. During the concatenation, JES3 generates temporary ddnames of the form JS3Dxxxx, where xxxx is a 4-digit sequence number. The JS3Dxxxx ddnames cannot be used in the JES3 procedure. If a procedure library data set in a concatenation cannot be found, JES3 removes the data set from the concatenation and issues a message.

Note: You cannot concatenate spool data sets. If your initialization stream contains INCLUDE statements, do not specify DDnames of the formJ3INCLxx on the DYNALLOC statements. These DDnames are used by JES3 to dynamically allocate the data set and member associated with an INCLUDE statement.

If a required resource (such as a dsname, unit, or volume) is unavailable, JES3 will wait for it to become available. If a required unit is offline, the operator will be asked to bring it online. An unavailable ddname is regarded as an error condition and will produce an error message.

DSN=

Required to specify the 1- to 44-character name of a standard label data set. If all other parameters are included and are specified at their maximum lengths, then the dsname is limited to 17 characters including periods and parentheses. Generation data group sets must use actual version and generation numbers.

UNIT=

Specifies the device number (by 3-digit or 4-digit hexadecimal number) for dynamic device allocation. A slash (/) preceding the device number is required when specifying a 4-digit device number to distinguish it from a device type. Device numbers can be specified by any of the following formats:

ddd
/ddd
/dddd

For dynamic data set allocation, specify the 1- to 8-character device type. This parameter is not required for a cataloged data set, but should be included for data sets that are not cataloged.

VOLSER=

Specifies the serial number of the volume that contains the data set. This parameter is not required for a cataloged data set, but should be included for data sets that are not cataloged.