I haven't heard of this as a "bug", Larry. Have you received a message asking where a particular file was found? And, if so, did you point to somewhere else? Usually the program looks for the data files where the PRO file is pointing and if the files aren't there, the program asks you to locate them. I would suggest printing a file list using the Project Summary report or look at the library files using the Help/About UFT/System Info window. The Source Library files are V_SOBOOK; the Source Link Library:V_LIBOOK; and the Source Types: V_STBOOK. [note: IF you have separate libraries for your projects, these will be numbered files rather than V_ files.]
Someone recently took care of a problem similar to this by reinstalling UFT, but you must be careful to reinstallusing the CUSTOM option, as you don't want to overwrite the library files.