I just tried out Plastic scm today and when I added a new user and restarted the server (./plasticsd start) I got this error:
Starting PlasticSCM server: Warning: /tmp/plasticd5.exe.lock lock file exists but process is not running. Please delete this file.
Warning: /tmp/plasticd5.exe.lock lock file exists but process is not running. Please delete this file.
Warning: /tmp/plasticd5.exe.lock lock file exists but process is not running. Please delete this file.
Warning: /tmp/plasticd5.exe.lock lo