Gebe and Walther - Poser is NOT running when I get the error. I double-checked just now and Poser is definitely not running when I search the pz3 file. Walther, do you have Poser4 or the Poser4 pro Pack? Which version number works for you too? I am running the 4.2.1.171 version of the pro pack. Maybe I just need the most recent upgrade to poser for it to work. Please let me know your version number and Poser4 base application on the Mac. thanks, Scott