Dave, I am wondering if Feature::mod is redundant now that all of our features are tagged as "ro" or "rw"... I am assuming that I can simply do a ->accessible call on the feature and choke if it is "ro", rather than testing if it is a Feature::mod? But de novo features are created as feature::mod's... why is that? Should all references to ::mod now change to some other more generic feature type (i.e. ::GenericFeature)? Hmmm.... things that make you go... M -- -------------------------------- "Speed is subsittute fo accurancy." ________________________________ Dr. Mark Wilkinson Bioinformatics Group National Research Council of Canada Plant Biotechnology Institute 110 Gymnasium Place Saskatoon, SK Canada