Apart from the obvious error caught by dws, I'd recommend keeping the my statements as locally scoped as possible, like this: 
foreach my $data_line (@thermo_params) {
   my @thermos = split /\s+/, $data_line;
   print "$_\n" for @thermos[0,2];
}

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-- Hofmator

In reply to Re: foreach problem by Hofmator
in thread foreach problem by Anonymous Monk

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