In call Transaction method it  depends upon the synchronous
and asynchrounous update in synchrounous it will stop at 7
th record and 7,8,9 record is not updated and BDCMSGCOLL
gives error msg the 7th record.  in asynchronous all the
records are updated except 7 record In sesion method 
database table is not updated and it will go to sesion log
file . and can  analise or correct the error foud in the
data file or program.
if find the error in data file u can correct them
interactevely . other wise u modified the batch input
program. ok thank u