EC7

Explanation
A severe error has occurred in the z/OS UNIX System Services
component that prohibits this system from executing.

The right-most four bytes of the program status word (PSW) have the following
format:x0rrrwww
where: 

x

Irrelevant information.

rrrr

A hexadecimal reason code indicating the reason for the failure.

www

The wait state code (EC7).

The reason codes are as follows: 

001

Shared file system support is enabled by the SYSPLEX(YES) parmlib statement that is specified in
the BPXPRM parmlib member used to initialize the system. The shared file system support has detected
that it is executing with a software service level that is incompatible with the software service
level of at least one active system in the sysplex that is also configured for shared file system
support. Operator message BPXF078W is issued to the system console.

002

Shared file system support is enabled by the SYSPLEX(YES) parmlib statement that is specified in
the BPXPRM parmlib member used to initialize the system. The shared file system support on another
active system has detected that this system is executing with a software service level that is
incompatible with the software service level of that system. The detecting system has requested that
this system be partitioned out of the sysplex. The detecting system has also issued operator message
BPXF077S indicating that this system is executing with an incompatible software service level.

System action
Either this system or another system in the sysplex issues operator messages about the
problem.

Operator response
Refer to the console log of all systems in this sysplex, including this system, for any messages
associated with this wait state. Contact the system programmer.

System programmer response
Review the message documentation associated with this wait state.

Source
z/OS UNIX System Services