IRRC058I

old-protocol

Explanation
You might have issued a TARGET command (or set
of TARGET commands) to define a new protocol for the specified remote
connection, and requested for that connection to be operative.  The
connection is successfully established under the new protocol, and
all the work that is contained within the workspace data sets belonging
to the old protocol is processed.  The old protocol instance, including
its workspace data sets, is deleted.

System action
The connection continues communicating by using
the new-protocol protocol with only the workspace data sets
associated with that protocol.

System programmer response
When IRRC058I is issued on both systems,
edit the RACF® parameter library
member to delete the TARGET statement or statements that defined the
old protocol.  It is no longer needed and causes unnecessary processing
the next time the member is processed.   Verify that the TARGET command
or commands that define and activate the new protocol are saved in
the parameter library (in case you entered them only from the console).
 See z/OS Security Server RACF System Programmer's Guidefor
information about the protocol conversion process. 

Routing code
2 and 9

Descriptor code
4