CA Dynam for VSE User Guide

Processing Predefined Multifile Volume Data Sets
For example, this statement defines a message to be sent at output CLOSE
time:
DEFINE 'CONVERT.FILE' COMSG='SEND TAPE TO DALLAS WITH COURIER TONIGHT'
At output CLOSE time, the following message displays on the console:
CADT999I SEND TAPE TO DALLAS WITH COURIER TONIGHT
Supplementary message definitions can be specified as follows:
To Issue A At Specify
CADT996I message Open Input time OIMSG=msg text
CADT997I message Open Output time OOMSG=msg text
CADT998I message Close Input time CIMSG=msg text
CADT999I message Close Output time COMSG=msg text
Supplementary messages are supported for both CA Dynam/D and
CA Dynam/T users. If a data set contains a supplementary message, the
message will be issued regardless of whether the file is processed as a tape or
a disk file.
Message output can be optionally directed to SYSLST, SYSLOG, or both. For
more information about instructions on maintaining these messages, see the
DYNCAT DEFINE/ALTER commands.
Processing Predefined Multifile Volume Data Sets
CA Dynam/T provides extensive support for multifile-volume data sets. Each
file is cataloged to the system and controlled separately, but always in the
desired sequence. Define multifile data sets with the DYNCAT DEFINE
command. Catalog the first file in the following manner:
• Specify all of the multifile data set attributes only for the first file.
• Catalog all subsequent files with the DEFINE command, specifying only the
data set name for the file being cataloged and the data set name for the
previous file on the volume. For example,
DEFINE 'DATA SET NAME' PREVFILE='PRIOR FILE'
Multifile data sets can also be supported as predefined or unchained data sets.
This means the data sets do not need to be written to tape in an exact order
and the data sets do not need to be predefined to the Catalog as multifile data
sets. The TLBL STACK option lets you specify a file's place within a multifile
data set.
2–62 User Guide