while (defined $line = <$inputFileHandle>)

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Because the  = operator has higher precedence than the defined operator you need to either enclose the assignment in parentheses:

while (defined( $line = <$inputFileHandle> ))

Or because perl does the defined test by default then just omit it and perl will do the right thing:

while ($line = <$inputFileHandle>)

In reply to Re^2: Can I split a 10GB file into 1 GB sizes using my repeating data pattern by jwkrahn
in thread Can I split a 10GB file into 1 GB sizes using my repeating data pattern by Anonymous Monk

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