The initial program load (IPL) program was unable to locate a necessary member in the SYS1.NUCLEUS data set.
If memname is another name, the member is either a module list table (MLT), a nucleus module list (NML), a nucleus device support module, or a member that was specified on an INCLUDE statement in the NUCLSTxx member.
The system enters wait state X'055'.
Because a console is not available for messages at IPL time, the system stores this message in the IPL WTO buffer.
See the operator response for wait state X'055'
See the system programmer response for wait state X'055'.
System initialization (IPL/NIP)
IEAIPL02