IEA006W LOGICAL PARTITION IDENTIFIER IS NOT IN THE RANGE OF 0-F

Explanation
The system  was IPLed in a partition with an logical
partition (LPAR) identifier greater than X'F'.  The current
level of z/OS® does not support
LPAR identifiers greater than X'F'. The current level of z/OS does not support non-zero
CSSIDs; the system must be at the z990 exploitation support or above to
support LPAR identifiers greater then X'F'.

System action
The system enters nonrestartable disabled wait
state X'07C' with reason code X'2'.   

System programmer response
Change the LPAR identifier assigned
to the partition in the LPAR image profile to a number in the range
of X'0 - F'

Source
Initial program load (IPL) and nucleus initialization
program (NIP)

Routing code
Note 9

Descriptor code
1.