Dear all, with respect to my recent query concerning the GeneClass2 software I was using to carry out assignment tests I have received a couple of well-informed responses. My main problem was that the software did not accept my file containing the to-be-assigned individuals. This held irrespective of whether I used a Genepop or Genetix format (both of which are supported by GeneClass2). The advice that finally made the software run was to add a .dat extension to the files. The software then immediately accepted the infiles. However, when I re-downloaded the software, it even accepted the files without this extension. So, eventually it might have been to do with my computer, too. Anyway, thank you very much out there for sharing your experiences with me. Should anyone need a working infile, he or she is welcome to contact me. All the best, Frank PD Dr. habil. Frank E. Zachos Zoological Institute Christian-Albrechts-University Kiel Olshausenstrasse 40 (postal address) 24118 Kiel, Germany Tel.: +49 / (0)431 - 8804529 Fax: +49 /(0)431 - 8801132 fzachos@zoologie.uni-kiel.de