validation in ob28
i have created a validation in ob28 for f-47. first i have created a form in zggbr000 and write code in it. after that i create a validation in ob28 and use this exit which i have created in zggbr000 in the check and prerequisite is sy-tcode = f-47.But when i give a break pont on that code and use t-code f-47 the debugger doesn't go to that code. plz any one help.
1. define form
exits-name = 'U403'.
exits-param = c_exit_param_none.
exits-title = 'AMOUNT VALIDATION'. " check order value
2.FORM U403 USING b_result
3.use ob28 and create validation
prerequsite = (sy-tcode = f-47)
check = u403