On Mon, 19 Aug 2002, Steve Hankin wrote: > yes? LET pid = {SPAWN:"echo $$"} > yes? SAVE/FILE=tmp.`pid` ... Hi Steve, Thanks for your reply -- but this appears to have the same problem as the example in my original message (spawn echo $$) E.g. try this: yes? let pid = {SPAWN:"echo $$"}; list pid yes? let pid = {SPAWN:"echo $$"}; list pid You should get 2 different answers. I believe it's returning the "spawn" subshell PID, not the Ferret PID, right? Andrew ---------------------------------------------------------------------- Andrew Wittenberg Program in Atmospheric and Oceanic Sciences andyw@splash.princeton.edu Princeton University ----------------------------------------------------------------------