CA Dynam for VSE User Guide

Using CA Dynam/T
Option
Specified
As
Purpose
Examples
drop D or 16 Erases the TLBL from the label track
for the file when it is closed. A
subsequent OPEN can process the
next TLBL with the same DTFname
hold H or 08 Prevents early drive release when the
file is closed. Assignment is reset by
JCL at EOJ.
identify HDR1 I Forces the IBM OPEN transients to
type HDR1 information from the tape
being processed on the SYSLOG
device.
modify A or 64 Modifies the open DTF file name when
there is more than one open tape file
with the same name (see Notes.)
// TLBL dtfname,'DSN,D'
// TLBL dtfname,'DSN'...16
// TLBL FILE1,'ABC,H'
// TLBL FILE1,'ABC',,,,,,08
// TLBL dtfname,'DSN,I'
// TLBL dtfname,'DSN,A'
// TLBL dtfname,'DSN'...64
multitask
LIOCS
Z
The CA Dynam/T work area used
between OPEN and CLOSE is released
whenever the task that opens the
tape is ended. The Z option will only
release the work area when the main
task ends. Therefore, the Z option
should be used if a sub-task that
opens a tape is ended before the tape
is closed.
// TLBL dtfname,'DSN,Z'
prohibit P Prohibits dynamic LUB allocation for
this DTF.
// TLBL dtfname,'DSN,P'
logical unit
override
S:nnn
Overrides the logical unit defined in
the DTF with the value (nnn) specified
and assigns the logical unit to a
dummy device.
// TLBL dtfname,'DSN,S:030'
delete label at
close
DL
Delete the label for the file at the
close of the file.
// TLBL dtfname,'DSN,DL'
EJECT E Eject cartridge from the robot at the
close of the file.
// TLBL dtfname,'DSN,E'
Notes on the MODIFY option:
CA Dynam/T modifies the file name of the DTF being opened to SYS0nnn,
where nnn is the logical unit being used for the file. This is necessary when a
program has two tape files with the same file name concurrently open (usually
one input and one output). This rare occurrence is most likely to appear in
ANSI COBOL programs with two SELECT statements for tape files, both
specifying the same external name.
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