aleph:~ [17:41:57]$ perl -c 600859.pl Name "main::br" used only once: possible typo at 600859.pl line 30. 600859.pl syntax OK aleph:~ [17:42:06]$ perl 600859.pl >/dev/null # A better place! Name "main::br" used only once: possible typo at 600859.pl line 30. readline() on unopened filehandle br at 600859.pl line 30.