Hi Shrivas,
The error you are getting of ' wa not too long ' is because your work area contains only 3 fields ,
whereas the table ( kna1 ) in which you are trying to insert the data consists of many more fields.
Solution for your error is that when you define your work area define like below.
DATA : BEGIN OF WA.
INCLUDE STRUCTURE KNA1.
DATA : END OF WA.
DATA : ITAB LIKE TABLE OF WA.
And when you create your screen add your fields from program using your WA.
in customer no. field property add conv. exit as ALPHA .
Code on save.
case sy-ucomm.
when 'SAVE'.
wa-mandt = sy-mandt.
insert kna1 from wa.
when others.
endcase.
Note : Use this program only for testing purpose as it is not advisable to manually add fields to KNA1.
Reward points if useful 