>no problems with data. just one of the many reports/andor screens I guess is corrupted. Therefore the rebuild stops with the error maessage. But no indication as to what file is the problem file. I remember, in the old days I had tha problem and I had a fix (I believe I had the builder write a log file) but I don;'t remember what I had done. :(

Are you sure there is no .ERR file somewhere? These have been in use since very early fox, AFAIK.