How can i display warning messages in user exit EXIT_SAPLMGMU_001 (MM02)

Question

Hi all,
while modifying the material master using MM02, i have added new conditions to display messages in user exit EXIT_SPALMGMU_001.
But using this user exit i am not able to display warning messages.
Can you please help me with this?
Sample code which i have included in exit :
SELECT SINGLE mstav FROM mara
INTO w_mstav
WHERE matnr = wmara-matnr.
IF wmara-mstav NE w_mstav.
IF wmara-mstdv NE sy-datum.
wmara-mstdv = sy-datum.
MESSAGE w177(z03_mm) WITH text-s04 text-s21.
ENDIF.
ENDIF.
Thank you all in advance.

Answer 1

As written in the SAP documentation of the Enhancement , you can only raise error message using a
MESSAGE .. RAISING APPLICATION_ERROR.
You could manage the "warning" yourself, sending an error first time and keeping a trace of the check in some STATICS variable, and not raising the error again if data input remains unchanged between two call of the include.
<i>----
EXIT_SAPLMGMU_001
Where Is the Customer Exit - EXIT_SAPLMGMU_001 called?
The customer exit is in function module MATERIAL_UPDATE_ALL. The
function module checks the data for errors (logical relationships,
foreign keys, fixed domain values, and so on) when the material master
is updated.
Use
o New fields
You can make checks possible for new fields of your own. These
checks must be identical to the checks that you carry out for your
new fields in online maintenance.
o Existing fields
For existing fields, you can extend and intensify the checks.
You can also change data for descriptions and general material data
(MARA). For example, the descriptions can be generated from attributes
of the material.
Limitations
You cannot bypass existing checks.
Interface to Application
The respective data of the current logical transaction is contained in
the structures, for example, in structure WMARA for MARA. Nonrelevant
structures are transferred with their initial values.
General material data that can be changed (CMARA) has the structure
MARU. This MARA view contains fewer internal fields than MARA itself. If
WMARA is filled, CMARA is also filled when accessed.
The customer exit contains the exception APPLICATION_ERROR for your
self-defined error situations.
Using the language element MESSAGE .. RAISING APPLICATION_ERROR, you can
terminate the current (logical) transaction and display your message in
the log. </i>
Regards