Environment
The requirements for the caller are:
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Minimum authorization: | Problem state, or supervisor state. PSW key must either
be 0, or match the value specified on IWM4MCRE. | Dispatchable unit mode: | Task or SRB | Cross memory mode: | Any PASN, any HASN, any SASN | AMODE: | 31-bit | ASC mode: | Primary | Interrupt status: | Enabled for I/O and external interrupts | Locks: | Unlocked when PARENT=FINDACTIVE is specified, otherwise, no
restrictions. | Control parameters: | Control parameters must be in the primary address space, except
the TCB, if specified, must reside in current home address space. |
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