07D

circular

Explanation
During system initialization, an error occurred
when the system tried to process the IEASYMxx parmlib member.  A reason
code in register 15 explains the error: Code
Explanation
00
The system found a circular system symbol definition in
IEASYMxx.  A circular system symbol definition is one that contains
another system symbol that is not resolved. System Action: The
system issues message IEA012E, which further describes the error,
to the NIP console.  The system enters a non-restartable wait state.
System
Programmer Response: See the system programmer response for message
IEA012E.

04
The system found an error in IEASYMxx from which it could not
recover.  The error occurred when the system tried to determine the
substitution text for a system symbol definition. System Action: The
system issues message IEA013E, which further describes the error,
to the NIP console.  The system enters a non-restartable wait state.
Operator
Response: Contact the system programmer.  Provide the text of
message IEA013E.
System Programmer Response: See the
system programmer response for message IEA013E.

Source
Nucleus initialization program (NIP)