Specification of AFPSTATS=YES will be ignored on systems with a PSF older than PSF for OS/390® 3.3.0.

The specification for the AFPSTATS keyword is exposed by PSF on the PSF Installation Exit. The Installation Exit can override the user's OUTPUT statement specification. When the Installation Exit overrides the OUTPUT statement specification of the AFPSTATS keyword, the user will receive a message in the sysout data set messages printed at the end of the sysout data set.