Thanks Mr.Hilmar, I normally use the memory variable to save the records, and before replacing the data I simple use the following ..

If rlock()
repl xyz with m_xyz,;
abc with m_abc ...
unlo
endif

I checked it also by making pair to pair cables connection, in starting it displayed an error but later it works fine.

Can u give me some examples, how can I do the same by using the functions tableupdate() and tablerevert(), please guide me..

Thanks - Saif