You might delete the first 10 lines of the input file and see if the problem line remains at 2048 (which pushes things into bug territory) or moves to 2038 (which indicates a file data problem).

If all else fails tack the input file data to the end of your script and print to STDOUT. Verify the problem still exists and post the code here. It would look something like:

use strict;
use warnings;

while (defined (my $line = <DATA>)){
    print $line;
}

__DATA__
0.004
0.003
0.004
0.006
0.006
0.008
0.006
0.006
0.006
0.005
0.006
0.007
0.007
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