AMD058I

Explanation
While attempting to access virtual storage currently
paged out, the stand-alone dump program obtained a unit control block
(UCB) address that could not be resolved into a working device.
In
the message text: dev
The device number. The number  be meaningless if the UCB failed
validity checking.
return-code
The return code, as follows: 4
Failed acronym validity test
8
Subchannel ID format incorrect
12
Subchannel not operational
16
Subchannel valid flag in SCHIB not on

System action
The stand-alone dump program continues dumping
accessible virtual storage. No data is dumped from the paging device
represented by the incorrect UCB.

Source
Stand-alone dump (SADMP)

Module
AMDSAUCB

Routing code
-

Descriptor code
-