What is the status AE_NOT_FOUND mean?

Hello,
I am working on supporting hot add memory on my box (IBM x445) via the
memory hot plug work that is going and but I am having some trouble with the acpi event itself. When I trigger the acpi event I get

acpi_bus-0077 [03] acpi_bus_get_device : No context for object
[f5413c68]

I dumped the status from acpi_get_data and it was 00000005, AE_NOT_FOUND.

I am not too sure where to head with this. What does AE_NOT_FOUND mean?

The call path is

acpi_bus_get_device
acpi_get_data
apci_ns_get_attached_data (which returns the AE_NOT_FOUND)

Is the bios not providing some data that is needed to handle the event or do I need to set something up before the action happens (registering a handler for the event)? The bios is pre ACPI 2.0. I am relatively new to ACPI and I would be grateful for any input that points be in the right direction.

Kernel is 2.6.12-based.

Thanks,
Keith Mannthey
LTC xSeries

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