there is a command to set the block size of memo fields SET BLOCKSIZE also are you writing to the same records again and again? (if so PACK MEMO is your answer probably ) Arnon > > I write a app that recieve serial port data into a table > by MSCOMM32.OCX. > I use a memo field to save data what recieved , and per record is 100K > long about,but when i have recieved 5 records , i find it's become 21M > long!!! (the FPT file of this table) I don't know what is happend. or memo > field has some fix block for saving data, they are fix long,and whatever > they are used ? > how can i try ? > (If someone is interest it , i can post my code to him via E-Mail..) > thanks everyone. >