With MacPerl I can say in AppleScript tell application "MacPerl" ignoring application responses Do Script "myscript.pl" end ignoring end tell and the call returns immediately, without waiting for the Perl script to finish. If I use the "do shell script" command in Mac OS 10.1.2 to call Perl, is there any way to skip waiting for the Perl script to finish? do shell script "/usr/bin/perl myscript.pl" Adding a tell block to some application and "ignoring application responses" does not work well enough. Is there any way to modify the UNIX command that starts Perl so that a background process is spawned and control returned to AppleScript immediately? A simple "&" or "nohup" does not make a change. Gero HerrmannThread Next