how to capture error messages in funtion module ?

Hi All ,

I have one requirement Ie to upload data into KP06 Tcode using Flat file (. txt) and using Fm below . my problem is i am unable to capture the error messages because there is no return parameter how can i capture the error messages i want to display this messages into alv format .

CALL FUNCTION 'K_COSTS_PLAN_INTERFACE_TOTAL'

EXPORTING

• BLTXT = ' '

• commit = 'X'

• DELTA = ' '

gjahr = ls_gjahr

kokrs = ls_kokrs

• messages_show = 'X'

perab = ls_perab

perbi = ls_perbi

• update_values = 'X'

versn = ls_versn

vrgng = 'RKP1'

• ONLINE_VB = ' '

irku01_cur = ls_irku01_cur

• TESTMODE = ' '

• KEEP_TWAER = ' '

TABLES

irku01g = lt_irku01g

EXCEPTIONS

messages_occured = 1

OTHERS = 2

.

• IF sy-subrc = 0.

• MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno

• WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.