Dear Alex,
Thanks for your advice. It's a good idea to blank all deleted records. Actually my program is a restaurant ordering/payment system. My strategy is to use a temporary file temp.dbf to hold details of an order. After the payment I zap the file and use it for next order. It involves many zap commands. If I use your method I still have to rewrite many parts of the program. It is another alternative to my way. Is there any quicker way?

Regards,
Harry