in reply to Tracing an Uninitialized Error

Tip #2 from the Basic debugging checklist: print 

foreach ( <INTERVAL> ) {
    print;

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Re^2: Tracing an Uninitialized Error
by Anonymous Monk on Jan 30, 2014 at 21:27 UTC
    Tip #5 from the Basic outright-wrong-code checklist: 
    while ( <INTERVAL> ) {

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    It also reveals why 'line 264' seems to be the source of the errors.
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[d/l]

In Section Seekers of Perl Wisdom