Messages with the EZY prefix can indicate problems with IBM TCP/IP.
The following error message (in the LTM for MVS log file or, if you run Replication Agent with the PING JCL parm, in the SYSOUT file) can indicate TCP/IP connectivity failure:
EZY3744E RC=
xxxx on
IUCV_CONNECT TO TCPIP
To resolve the TCP/IP connectivity failure
Check the values of the Replication Server parameters in the configuration file.
Check the values of the Replication Definitions Connection in the configuration file.
“Installing Replication Agent” in the Replication Agent for DB2 UDB Installation Guide for OS/390.
IBM TCP/IP documentation