I've been working through the fundamentals JCL pdf and made my copy of the JCL file in my dataset.

I edited it to try and fix the (expected) error, but now when I submit get the error:

IEF642I EXCESSIVE PARAMETER LENGTH IN THE SYSOUT FIELD

As the file isn't setting a sysout field (that I can see, or understand), where do I need to look to address this?
the JCL file is as follows:

//JCL1     JOB
//COPYJCL2 EXEC PGM=IEBGENER
//SYSPRINT DD SYSOUT=JES2
//SYSIN    DD DUMMY
//SYSUT1   DD DISP=SHR,DSN=ZXP.PUBLIC.JCL(JCL2)
//TARGET   DD DISP=SHR,DSN=&SYSUID..JCL(JCL2)
//*
//COPYJCL3 EXEC PGM=IEBGENER
//SYSPRINT DD SYSOUT=JES2
//SYSIN    DD DUMMY
//SOURCE   DD DISP=SHR,DSN=ZXP.PUBLIC.JCL(JCL3)
//SYSUT2   DD DISP=SHR,DSN=&SYSUID..JCL(JCL3)

 I'm reading up on the message IEF642I

 but I don't know enough about this or the system yet to understand how to address the error.

Max - you have had this answered already, a couple of weeks ago.

`SYSOUT=JES2` is wrong - it should have been left unchanged as `SYSOUT=*`

You will find faster help for IBM Z XPlore-related questions by using the forum on the platform itself. 

//JCL1     JOB//COPYJCL2 EXEC PGM=IEBGENER//SYSPRINT DD SYSOUT=JES2//SYSIN    DD DUMMY//SYSUT1   DD DISP=SHR,DSN=ZXP.PUBLIC.JCL(JCL2)//TARGET   DD DISP=SHR,DSN=&SYSUID..JCL(JCL2)//*//COPYJCL3 EXEC PGM=IEBGENER//SYSPRINT DD SYSOUT=JES2//SYSIN    DD DUMMY//SOURCE   DD DISP=SHR,DSN=ZXP.PUBLIC.JCL(JCL3)//SYSUT2   DD DISP=SHR,DSN=&SYSUID..JCL(JCL3)