Thanks for reply,
In above picture, safety and security is main row of the table acc_modification.In that I have a cell untitled Text Field, I wrap this cell into two subforms :
1) it_ts1 is the main subform which include the second table which data I want to display in that cell
2) (Untitled Subform) I used it as a body row
In this configuration when data got exceed I am getting a problem of data truncation, and sometimes the page between two main rows display as blank.
--Mandar