Coming out of loop

DEAR TECHIS,,

plz tell me the way to come out from the loop of item table

i have devloped a bdc prog for Customer invoice fb70. for that i have used two tables for header and item. here my problem is after posting the data. the loop is not breaking of item table to undersanding pupuse i m giving smalle

as

loop at header .

performe...

......

.......

loop at item where acnt = header-acnt.

perform........

........

......

endloop.

endloop.

Here i didnt get the way to come out from the item tables loop.

pls reply....

Rewards for useful ans..

thanks in advance...