Preallocation of List/Log data sets to SYSOUT

ISPF normally allocates the ISPF list and log data sets (sequential data sets) the first time a user requests printed output or takes action that generates log output. The user can control the printing and disposition of these data sets at ISPF termination and by issuing the ISPF LOG and LIST commands.

You can preallocate the list and log data sets directly to SYSOUT by including one or both of these DD statements in the TSO LOGON procedure:

//ISPLIST  DD SYSOUT=A,
//        DCB=(LRECL=121,BLKSIZE=1210,RECFM=FBA)

//ISPLOG   DD SYSOUT=A,
//        DCB=(LRECL=125,BLKSIZE=129,RECFM=VA)

If you preallocate these data sets to SYSOUT, they are automatically printed when the user logs off TSO. Also, when the user exits from ISPF, the termination menu is bypassed. If the user reenters ISPF before logging off, any new output is added to the end of the SYSOUT data sets.

Note:

You cannot use ISPF option 7.5 to browse log data sets allocated to SYSOUT.
You can use the ISPF Log/List pop-up on the Settings panel to specify either the number of lines per page or to bypass logging altogether (by specifying zero primary pages). The rest of the information on these panels is ignored if the list and log data sets are allocated to SYSOUT.
The defaults for the list data set are LRECL=121, line length=120, RECFM=FBA, as they were in the previous licensed programs. However, you can use the Log/List pop-up on the Settings panel to change the characteristics of the list data set so screen images wider than 121 characters can be printed.
You cannot issue the LOG or LIST command to process a preallocated log or list data set.
The ISPF temporary data set default names associated with the ISPLOG ddname are SPFLOGx.LIST, where x=numeric value 0-9.
The ISPF temporary data set default names associated with the ISPLIST ddname are SPFx.LIST, where x=numeric value 0-9.