Thanks to your reply but i still cant retrieved the files which lower case 'f'.

Accutaly some of our data entry peaople scanning the file which capslock is off, and the time of request the file comes up but at the time of prossesing scanner scanning the file labels with filenumber cap 'F' but in table the entry is lower case.I want update all the files which are lower case 'f'.Plz reply to see this criteria.

Thanks again.