Thanks a lot for your anwser. I'm going to use a more recent software like Mark or Capwire. -- View this message in context: http://r.789695.n4.nabble.com/rarefaction-curves-unable-to-run-the-R-script-from-Gimlet-tp4106847p4114545.html Sent from the R help mailing list archive at Nabble.com.