ALV Report

Dear sir,

I have ztode named with 'ZFBL1N'. it is retrived from standad tcode 'FBL1N'

it is a alv report

when i am try to change the layout in the output list

it is going to standard prg's include

so that 1 itab(it_specfld) is not retriving data

this is the problem . please suggest me

Thanking you,

sudhakar