The problem is -s returns undef if the file does not exist. Then undef causes the 'uninitialized' warning. One fix for this is to set $flag_size to 0 when -s returns undef: 

my $flag_size = -s 'online.flg' || 0;

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YuckDef

In reply to Re: Use of uninitialized value in numeric gt (>) by YuckFoo
in thread Use of uninitialized value in numeric gt (>) by wolis

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