My CM 5.2.1 (on LMS 3.2, running on a non-virtual server instance on Windows Server 2008 Standard x64 with SP1) is not properly collecting data during User Tracking. Major and minor acquisitions are running per the default schedule but not actually collecting any data. I tired kicking off an ad hoc acquisition and got the error shown in the attached screenshot.
A CSC search and check of Bug Tracker seemed to indicate that Bug CSCtd49439 may be responsible. So I got the patch from the TAC and auccessfully installed it. However, I get the same results from User Tracking.
The server appears to be operating normally otherwise.
you could check if there is a file named "xmlwrite.lock" in your Cisco Works folder. Don´t know the exact position, so maybe u can use the windows search for the whole CW installation folder to find that file.
U can delete this file, after that, try to start the Ut again.