$ audacity 

(Audacity:6361): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(Audacity:6361): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(Audacity:6361): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(Audacity:6361): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

(Audacity:6361): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",


Pop-Up:

The system has detected that another copy of Audacity is running.
Running two copies of Audacity simultaneously may cause
data loss or cause your system to crash.

Use the New or Open commands in the currently running Audacity
process to open multiple projects simultaneously.