Problem in Modulepool Screen validation

Hi friends,

In my Prog. i am using Modulepool screen with 10 fields on it.

Using this screen i am updating the Ztable.

In these fields if i enter the wrong data then it is displaying the system defined error message like <b>'Entry xx is defined in T178 table, check your entry'</b>.

But in my requirment i need to get my own Error Message insted of system message.

Is it possible or not.

Iam sending the code which i designed in Modulescreen .

<b>PROCESS BEFORE OUTPUT.

MODULE clear .

MODULE status.

PROCESS AFTER INPUT.

MODULE exit AT EXIT-COMMAND.

CHAIN .

FIELD zmjbr_det-spg.

FIELD zmjbr_det-brand MODULE validation_brand.

FIELD zmjbr_det-flavor MODULE validation_flavor.

FIELD zmjbr_det-beverage_prod MODULE validation_beverage_prod.

FIELD zmjbr_det-pack_type .

FIELD zmjbr_det-pack_size .

FIELD zmjbr_det-tragr .

FIELD zmjbr_det-to_eff_date MODULE validation_to_date.

FIELD zmjbr_det-from_eff_date MODULE validation_from_date.

FIELD zmjbr_det-major_brand MODULE validation_major_brand.

ENDCHAIN .

MODULE user_command.

PROCESS ON VALUE-REQUEST .

FIELD zmjbr_det-brand MODULE value_req_brand .

FIELD zmjbr_det-flavor MODULE value_req_flavor .

FIELD zmjbr_det-beverage_prod MODULE value_req_beverage_prod .</b>

in above code for the following fields i need own error messages.

spg (T178-KONDM) ,

pack_type (TMFG-MFRGR),

pack_size (TVM1-MVGR1) ,

tragr (TTGR-TRAGR) ,

major_brand (TVBO-BONUS).

• Reward is Sure.

Thanks,

Anil.