I’m running ubuntu 12.04 with a UA-25 EX.
Audacity worked for a few times. But suddenly I get the warning message “The system has detected that another copy of Audacity is running…” and I can’t open it.
I killed the task, and I reinstalled and rebooted a few times too. Any idea?
See if there is a lock file (called audacity-lock-<username/>) in "/var/tmp/audacity-<username/>/
(<username/> is your user name)
If there is, delete it.
Try resetting the Audacity Preferences. To do that, delete the file audacity.cfg from ~/.audacity-data/