Norbert Preining <preining@logic.at> wrote: > if ($line =~ m/^[^\w#]*([\w-]+)*/( { > > > Or are there any other characters we will have in formats??? Underscores? Why not just look for non-whitespace? Regards, Frank -- Dr. Frank Küster Single Molecule Spectroscopy, Protein Folding @ Inst. f. Biochemie, Univ. Zürich Debian Developer (teTeX/TeXLive)