I would believe so. Basically anything that requires more than 1 CPU needs a PE. But I'll send an e-mail to the SGE mailing-list to ask whether there is an easier way or not. (http://gridengine.sunsource.net/project/gridengine/maillist.html) -Ron --- Ivo Grosse wrote: > Perhaps: qsub -pe threads 2 <my_blast_script>? > > Or something else instead of threads? > __________________________________________________ Do You Yahoo!? Yahoo! - Official partner of 2002 FIFA World Cup http://fifaworldcup.yahoo.com