CA TLMS automatically prevents "double opens" of an output data set to the same volume by the same job without first being closed. To re-create a data set on the same volume on which it was originally created, set this option to a value greater than zero.
Use the DBLTIME system option to determine the time interval (after creation) during which CA TLMS allows a double open of the same tape data set by the same job.
If a data set requires a higher time than that set by this option, you must code SPACE=(1,(1,3)) on the DD statement for the data set. This will override the time limit set by the DBLTIME option.
Note: To limit the double open of a data set to the same physical device on which it was previously opened, use the DBLDRIV option.
This system option has the following format:
DBLTIME=hhmmss
Specifies the amount of time in hours, minutes, and seconds after creation that will pass, during which the same data set can be reopened.
The value 240000 permits all double opens. If specified as 000000, a SPACE=(1,(1,3)) will not override it.
Default: 000000 (disallow any double opens)
Example: DBLTIME System Option
This example illustrates that the same data set cannot be opened again after 12 hours from creation.
DBLTIME=120000
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