You can process the log and list data sets either:

• During an ISPF session, using the LOG and LIST commands
• At the end of a session.

ISPF processes (prints, keeps, deletes) only data sets that it has allocated. Any attempt to process a log or list data set that has been preallocated by the user results in an appropriate ISPF message. Any references to ISPF processing of log or list data sets refer to data sets that ISPF has allocated. Users can supply routines to process preallocated data sets after ISPF has terminated.