Help with User-Exit.

Hi Folks!

I'm kind of new in the area of developing enhancements such as a User Exit. What i'm trying to do is to control that some document clases cannot contain certain account assignment category, especifically the 'T'. The user exit i'm using is EXIT_SAPLMEREQ_008, this is called before a process called post.

The code is the following:

<i>DATA: lt_req_items TYPE mmpur_requisition_items,

ls_req_items LIKE LINE OF lt_req_items.

DATA: TABLA TYPE MMPUR_REQUISITION_ITEMS.

DATA: ZMEREQ_ITEM like MEREQ_ITEM.

DATA: IDMEN(5).

DATA: LINEA TYPE UEBAN.

DATA TABLA2 LIKE MEREQ_ITEM-BNFPO OCCURS 0.

Call method IM_REQ_HEADER->GET_ITEMS

receiving RE_ITEMS = TABLA.

• CALL METHOD IM_REQ_HEADER->LOOKUP

• RECEIVING IM_BNFPO = TABLA2.

IMPORT ZMEREQ_ITEM FROM MEMORY ID 'ZM'.

• LOOP AT TABLA INTO ls_req_items.

• ls_req_items->ITEM-IM_DATA = ZMEREQ_ITEM.

• ENDLOOP.

<b>* MODIFICACION REALIZADA POR GLI 27-07-2006 ******

• Valida que los documentos indicados por el req

• MM-SOLP-001 no tengan tipo de imputacion T.</b>

LOOP AT IM_EBAN_CHANGES INTO LINEA.

if ( LINEA-BSART = 'G021' or ( LINEA-BSART between 'G201' and 'G219' )

OR LINEA-BSART = 'G660' ) and LINEA-KNTTP = 'T'.

MESSAGE ID 'ZM' TYPE 'E' NUMBER '002'.

endif.

IDMEN = LINEA-BNFPO .

IMPORT ZMEREQ_ITEM FROM MEMORY ID IDMEN.

LINEA-ZZAVANR1 = ZMEREQ_ITEM-ZZAVANR1 .

LINEA-ZZNETWR1 = ZMEREQ_ITEM-ZZNETWR1 .

LINEA-ZZAVANR2 = ZMEREQ_ITEM-ZZAVANR2 .

LINEA-ZZNETWR2 = ZMEREQ_ITEM-ZZNETWR2 .

LINEA-ZZAVANR3 = ZMEREQ_ITEM-ZZAVANR3 .

LINEA-ZZNETWR3 = ZMEREQ_ITEM-ZZNETWR3 .

• MODIFY IM_EBAN_CHANGES-ZZNETWR3 FROM LINEA-ZZNETWR3.

ENDLOOP.</i>

The problems are:

1. Strangely when I debug this code, the debugger checks the comments. It goes through it, don't really get this behavior.

2. When it gets in:

LOOP AT IM_EBAN_CHANGES INTO LINEA.

It executes like the 3 lines then stops, and it exits and don't execute the message, nor the following code when the if statement is false:

IDMEN = LINEA-BNFPO .

IMPORT ZMEREQ_ITEM FROM MEMORY ID IDMEN.

LINEA-ZZAVANR1 = ZMEREQ_ITEM-ZZAVANR1 .

LINEA-ZZNETWR1 = ZMEREQ_ITEM-ZZNETWR1 .

LINEA-ZZAVANR2 = ZMEREQ_ITEM-ZZAVANR2 .

LINEA-ZZNETWR2 = ZMEREQ_ITEM-ZZNETWR2 .

LINEA-ZZAVANR3 = ZMEREQ_ITEM-ZZAVANR3 .

LINEA-ZZNETWR3 = ZMEREQ_ITEM-ZZNETWR3 .

My questions are:

1. Are there any lines limit for an user-exit, because this behavior is pretty strange for me.

2. Why does this user-exit executes comments? (Just in case, the comments are fine)

I will appreciate your help.

Thanks.

Best Regards,

Gilberto Li