Got following error in ESP JESMSGLG:
ESP1547W Invalid message received by Agent Receiver CYBTCPIP from 9126.96.36.1999:9999
The receiver.log shows error "Can't parse the message".
CA WA ESP Edition 11.4 Z/OS
Caused by unmatched encryption key in AGENTDEF table and agentparm.txt.
Define same encryption key in AGENTDEF table on ESP side and agentparm.txt on agent side.
See more detail in agent implementation Guide about keygen utility, which is used to convert the encryption key defined in AGENTDEF to the file used in agentparm.txt.