Sent this by e-mail before I knew I should post here (sorry!). Was responding to a post and got:

Software error: Can't EXlock 'ubb/cache-H3KVM5EU/lock/global.cgi'. The exact error returned by the operating system is: Unknown error[...] For help, please send mail to this site's webmaster, giving this error message and the time and date of the error. [Thu Sep 22 18:03:50 2005] \\frigga\home\users\web\b154/hoc.adrsupport\private-cgi-bin\ultimatebb.cgi: Can't EXlock 'ubb/cache-H3KVM5EU/lock/global.cgi'. [Thu Sep 22 18:03:50 2005] \\frigga\home\users\web\b154\hoc.adrsupport\privat e-cgi-bin\ultimatebb.cgi: [Thu Sep 22 18:03:50 2005] \\frigga\home\users\web\b154\hoc.adrsupport\privat e-cgi-bin\ultimatebb.cgi: The exact error returned by the operating system is: [Thu Sep 22 18:03:50 2005] \\frigga\home\users\web\b154\hoc.adrsupport\privat e-cgi-bin\ultimatebb.cgi: Unknown error