NonStop Operating System Event Management Programming Manual
Low-Level I/O Event Messages (ZGIO)
HP NonStop Operating System Event Management Programming Manual—520372-020
3-30
Messages
Effect. The I/O operation in progress is aborted. This event is probably followed by a 
processor freeze.
Recovery. If the error continues to occur, see Recovery Action Requiring Vendor 
Support on page 3-13.
116: ZGIO-EVT-IIOIOCABSENT
The page containing the current IOC is marked absent from physical memory.
Unconditional Tokens
Cause. Always lock the I/O controller (IOC) table in physical memory. If the page that 
contains the IOC table is marked absent, a failure occurred either in the software 
Subject: ZGIO-TKN-CHANNEL, ZGIO-TKN-CONTROLLER, and 
ZGIO-TKN-UNIT
Type of event: Device-related or controller-related
Potentially critical event: Yes
Action event: No
Message sender: I/O process
TMDS collector: Yes
Unconditional Tokens
ZEMS-TKN-EVENTNUMBER token-type ZSPI-TYP-INT
ZEMS-MAP-EXIOADDR definition ZSPI-DDL-EXIOADDR
ZGIO-TKN-CHANNEL token-type ZSPI-TYP-UINT
ZGIO-TKN-CONTROLLER token-type ZSPI-TYP-BYTE
ZGIO-TKN-UNIT token-type ZSPI-TYP-BYTE
ZGIO-TKN-FECODE token-type ZSPI-TYP-BYTE
Event-Message Text
PAGE ABSENT ON ACCESS TO IOC, CHAN %channel, 
CTLR %controller, UNIT %device
Token Description
ZEMS-TKN-EVENTNUMBER Event number for this message. Value is ZGIO-EVT-
IIOIOCABSENT (116).
ZEMS-MAP-EXIOADDR External (physical) I/O address.
ZGIO-TKN-CHANNEL Subject token that specifies the channel affected by this 
event.
ZGIO-TKN-CONTROLLER Subject token that specifies the controller number for the 
event.
ZGIO-TKN-UNIT Subject token that specifies the unit number for the event.
ZGIO-TKN-FECODE File-system error code returned when an invalid command 
is sent to the device.










