http://qs321.pair.com?node_id=11114007


in reply to Re^4: How to use Devel::NYTProf on Apache
in thread How to use Devel::NYTProf on Apache

the man page does not mention a usage like nytprofhtml nytprof.out.123 . Use nytprofhtml -f nytprof.out.123 as swl advised.