7C4

Explanation
JES3 encountered an error when calling a JESXCF
console-related function. The abend reason code identifies the specific
error. Code
Explanation
01
IATXCSIF SERVICE=XAUTH was passed a bad parameter list (service
routine IATCS01). Analyze the parameter list to determine the problem.
03
IATXCSIF SERVICE=CONSTYPE was passed a bad parameter list (service
routine IATCS03). Analyze the parameter list to determine the problem.
04
During JES3 initialization processing, module IATINC2 detected
an error while invoking an IXZXCNSV order. An IXZXCNSV ORDER(START)
returned with a bad return code. The return and reason code for the
IXZXCNSV macro invocation is within the IXZXCNSV parameter list. 
The parameter list is contained within the automatic area of IATCS04.
 The automatic area is pointed to by general register 8 at the time
of failure.  Use the return and reason codes to determine why JESXCF
failed to process the START order successfully.Note: One common cause
of this error is an incorrect MSCOPE value that is passed in as an
argument to the call. Run the command D XCF,COUPLE and
ensure that the MAXSYSTEM value that is returned for the SYSPLEX couple
data sets is greater than or equal to the total number of mains defined
in the JES3 initialization deck.

05
During JES3 initialization processing, module IATINC2 detected
an error while invoking an IXZXCNSV order. An IXZXCNSV ORDER(SYNCPT)
returned with a bad return code. The return and reason code for the
IXZXCNSV macro invocation is within the IXZXCNSV parameter list. 
The parameter list is contained within the automatic area of IATCS04.
 The automatic area is pointed to by general register 8 at the time
of failure.  Use the return and reason codes to determine why JESXCF
failed to process the SYNCPT order successfully.

System action
For reason codes X'01' and X'03',
varies with invoking function. For reason codes X'04' and X'05',
JES3 initialization continues but the remote console function may
be lost or produce unpredictable results.

System programmer response
To determine the error, refer to reason
code descriptions. 

Source
JES3