These error messages are prefaced by CIA040xx. You can dump the error log to determine the failed program name, transaction, target name, target APPLID, conversation Id, CICS® response codes and External Security Manager (ESM) return codes among other pertinent information. Use this information to assist in problem diagnosis.
Reference the CICS Front End Programming Interface User's Guide for CICS response codes and definitions. Additional diagnostic information can be found in the FEPI message log or any event-handling transaction that can be installed.