Insulated DD request - Key = '0079'

DUNINSDD indicates that the insulated DD attribute was previously assigned to this allocation and that it should be deallocated.

For a description of this key, see Insulated DD attribute. When you code this key, # must be zero, and LEN and PARM are not specified.

For an unallocation by data set name request using the DUNDSNAM text unit (X'0002'), only resources with the insulated DD attribute are deallocated when DUNINSDD is specified; any resources that do not have the insulated DD attribute are ignored. Alternatively, if the DUNINSDD text unit is not specified, only resources that do not have the insulated DD attribute are deallocated; any resources that have the insulated DD attribute are ignored

When you code the DUNINSDD text unit, you must also specify the DUNUNALC text unit (X'0008').

This text unit is available on z/OS® 1.13 and later systems with APAR OA47824 installed. When this support is available, the JESIBSAV flag in the JESCT is on. See the IEFJESCT macro for usage in formation.

Note: To specify DUNINSDD, your program must be APF-authorized, in supervisor state, or running with PSW key 0 - 7.

Example: To request unallocation of resources that have the insulated DD attribute, code:

KEY   #     LEN      PARM
0079  0000  -        -