While checking the number of current users using this copy of PC Access there was an error releasing the lock. You may have to reboot to release the lock.
The UAM was attempting to figure out how many people are currently using the network version of PC Access you have installed on your computer. During this the UAM was unable to process the lock mechanism, so it is possible that your attempt to check the number of users has inadvertently used one of the user counts. To fix this problem, simply reboot your computer. This should release the user count lock that the UAM accidentally used in the checking process.