Can't read file
If this happens when starting up Oxford WordSmith Tools, there is probably a component file missing. One example is sayings.txt, which holds sayings that appear in the main Controller window. If you've deleted it, I suggest you use notepad to start a new sayings.txt and put one blank line in it.
If you get this message at another time, something has gone wrong with a disk reading operation. The file you're trying to read in may be corrupted. This happens easily if you often handle very large files, especially if it's a long time since you last ran Scandisk to check whether any clusters in your files have got lost. See your DOS or Windows manual for help on fragmentation.