User Exit

[Former Member]

I am tryin to create a userexit. when for a particular transaction when user enter serial number I have to make it doesn't exist and is in the specified format ( 1st digit should be 7 5,8 last four digits should be between 0000-9999).For all other transaction I have to make the serial number is present and specify error message if non-existent number is entered. I was able to come up with the following code. Please let me know to how to validate the format of the code....

IF sy-tcode = 'xxxx'.

SELECT SINGLE * FROM equi INTO i_equi

WHERE eqtyp = 'S'

AND matnr = matnr

AND sernr = sernr.

IF sy-subrc EQ 0.

MESSAGE E398(00) WITH 'serial number already exists'.

ELSE.

• check validation like sernr+0(1) = first digit

• sernr1(2) = sy-datum2(2).

• sernr3(2) = sy-datum0(2).

• sernr+5(4) = last four digits.

ENDIF.

ELSE.

SELECT SINGLE * FROM equi INTO i_equi

WHERE eqtyp = 'S'

AND matnr = matnr

AND sernr = sernr.

IF sy-subrc NE 0.

MESSAGE E398(00) WITH 'Please enter a valid serial number'.

ENDIF.

ENDIF.

[Former Member]

Please someone help with completing this one.

[Former Member]

I didnt really get your question - i mean, what do you want help with?

1. What's the transaction code(s) you're using?

2. Have you already identified the user-exit, or is that what you are asking here?

3. Having an error-message in a UE? Please check a few things first - is that the expected/required behaviour? Also, will it work? Just insert a single e-message in the UE, with no other code, and see if your transaction actually errors out, or throws up a runtime error, or simply doesnt do anything!

Plz award points if answers are useful!

[Former Member]

I have identified the User Exit....Now I have to code it properly...I want anyone to go through the code...and help in writing correct code.