00E

Explanation
Initial program load (IPL) cannot continue due to a problem on the system
residence (SYSRES) volume. 
The right-most four bytes of the program status word (PSW) have
the following format:xrr00www
where:x
Irrelevant information.
rr
A hexadecimal reason code indicating the reason for the failure.
www
The wait state code.

The reason code (rr) is one of the following:Reason Code
Explanation
01
IPL cannot locate the SYS1.NUCLEUS data set or the system nucleus member of the SYS1.NUCLEUS
data set on the system residence volume or the SYS1.NUCLEUS data set is described by
a format 8 DSCB. The nucleus member is one of the following: IEANUC01, which is DAT-on nucleus IEANUC01
IEANUC0x, which is an alternate DAT-on nucleus where x is not 1
IEAVEDAT, which is the DAT-off nucleus

 DAT is the acronym for dynamic address translation. 

02
An incorrect system residence (SYSRES) volume has been chosen for the IPL.

System action
The system enters a non-restartable wait state. 

Operator response
Reason Code
Action
01
If you selected an alternate DAT-on nucleus member, make sure that the alternate nucleus
identifier (x of IEANUC0x) was correctly entered through the console frame, or at absolute storage
location X' F'. Then reIPL the system.
02
Ensure that the correct SYSRES volume is specified for the IPL then reIPL the system.

If the error persists, notify the system programmer. Obtain a stand-alone dump if
requested by the system programmer.

System programmer response
Reason Code
Action
01
Make sure that the SYS1.NUCLEUS data set resides on the system residence volume, and that it
contains the members you want to load, and that it is a data set described with a
format 1 DSCB in the VTOC, not a format 8 DSCB.
02
Ensure that the correct SYSRES volume is specified for the IPL and that the hardware management
console (HMC) load profile points to this volume. Then reIPL the system.

If the problem persists, search problem reporting databases for a fix for the problem.
If no fix exists, contact the IBM® Support Center. Provide the
stand-alone dump. For reason code 01, also provide the name of the SYS1.NUCLEUS member that the IPL
program could not find.

Source
Initial program load (IPL)